CipherLab RK26 troubleshooting guide: errors, faults and fixes

Short answer: The RK26 only charges between 0 °C and 45 °C: outside this range, LED 1 flashes red and charging stops. Unplug the charger, bring the mobile computer back to a suitable temperature, then plug it back in.

Likely cause

The RK26 manual associates LED 1 flashing red with a “Charging temperature error” (below 0 °C or above 45 °C). At 0 °C or below, it states that the front panel flashes and charging remains paused until a suitable temperature returns.

Caution: Only use the CipherLab Li-ion / Li-polymer charger, never leave a battery charging unattended, and do not expose the battery to water or fire.

What to do

1. Unplug the charger, as the manual instructs.
2. Place the mobile computer in a room at a suitable temperature and wait for it to adjust.
3. Plug it back in indoors, in a ventilated room, out of direct sunlight.
4. Check LED 1: solid red while charging, solid green once charged.
5. If the flashing continues, try another battery, then another cable or cradle (see the mobile computer will not charge).

The manual recommends a charging temperature of 20 to 30 °C in its safety instructions, and of 18 to 25 °C in the chapter on charging.

Sources: 2.4.1 Status LED (opens in a new window) · 2.1.5 Battery Precautions (opens in a new window) · Important Notices (opens in a new window) · 1.2.1 Charge the Mobile Computer (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 (official documentation).

Short answer: The RK26 backup battery is too low to guarantee a battery swap. Connect the mobile computer to mains power until the notification disappears, and only then replace the main battery.

Likely cause

The RK26 manual forbids replacing the main battery while “Low Sub Battery” is displayed, and asks you to connect an external power supply until the notification disappears. This backup battery recharges in about 4 hours.

What to do

1. Keep the main battery in place.
2. Connect the USB-C cable or the snap-on cable, or place the mobile computer in its cradle.
3. Wait for the notification to disappear.
4. Then carry out the battery swap.

Sources: 2.1.3 Replace Main Battery (opens in a new window) · 1.2.1 Charge the Mobile Computer (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 (official documentation).

Short answer: First test scanning in ReaderConfig: “Scan Test”, aim at the barcode, press a side trigger. If nothing is read, enable the barcode's symbology in the ReaderConfig profile and check that “Enable Reader” is ticked.

Likely cause

According to the RK26 manual, the mobile computer only reads the symbologies enabled in ReaderConfig; disabled ones are ignored. The scan engine depends on the configuration purchased (SE4750SR, SE4100, SE4750MR or SE5500 according to the product page), and so do the available symbologies.

Caution: Class 2 laser light: do not stare into the beam and do not point it at anyone's eyes.

What to do

1. Open ReaderConfig, tap “Scan Test”, aim at the barcode and press the left or right trigger.
2. A successful read gives a beep and a green LED flash; otherwise, continue.
3. Check in the main menu that “Enable Reader” is ticked (default setting).
4. In the “Default” profile, enable the symbology of the barcode to be read.
5. Wipe the scan window with a glasses cleaning cloth, then dry it.

The green good-read light depends on a ReaderConfig setting: see no green light when scanning.

Sources: 2.8.1 Barcode Reader (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 · 2.9.1 Barcode Reader (opens in a new window) – RK26 Mobile Computer Reference Manual for Android 14 v1.00 · 1.2.3 Scan Test, 1.2.5 Enable Reader (opens in a new window) – ReaderConfig User Guide for Android v1.03 · Wi-Fi 6 Rugged Mobile Computer, RK26 Series - CipherLab Co., Ltd. (opens in a new window) – CipherLab product page · Mobile Computers - CipherLab Co., Ltd. (opens in a new window) – CipherLab website, Support and Services, Device Cleaning & Disinfecting · Important Notices (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 (official documentation).

Short answer: The aiming pattern and illumination are set in ReaderConfig: “Decode Aiming Pattern” and “Decoding Illumination” are enabled by default. Re-enable them and set their power back to 10 if a profile has changed them.

Likely cause

The ReaderConfig guide describes the aiming pattern as a projected cross, enabled by default, with an aiming power of 10 and an “Aim Timeout Interval” of 3, which only apply in Aim or Level and Aim mode. The illumination can be set from 1 to 10 (10 = 100% by default). The CipherLab FAQ confirms that the 2D engine illumination can be turned off in ReaderConfig.

What to do

1. Open ReaderConfig, then the profile in use, scanner preferences section (Scanner Preferences).
2. Enable “Decode Aiming Pattern” and check “Aiming Power Level”.
3. Enable “Decoding Illumination” and set “Illumination Power Level” to 10.
4. Check the scan mode: Level, Release Scan, Aim, Level and Aim, Presentation or Continuous.
5. Test with “Scan Test”.

Sources: 2.2 Scanner Preferences (opens in a new window) – ReaderConfig User Guide for Android v1.03 · How to enable / disable 2D reader illumination? (opens in a new window) – CipherLab Technical FAQ (support knowledge base) (official documentation).

Short answer: The CipherLab FAQ links this symbol to the GS1-128 separator character. In ReaderConfig, open “GS1-128 Detail”, clear “Separator Character” or select “Null”, then try again.

Likely cause

The CipherLab FAQ on ReaderConfig does not detail the cause, but corrects this symbol through the GS1-128 separator character setting.

CipherLab procedure

1. Open ReaderConfig and select the “Default” profile.
2. Go to “1D Symbologies”, then “GS1-128 Detail”.
3. Tap “Separator Character” and clear the current setting; if no character is defined, select “Null”.
4. Go back with the arrow at the bottom of the screen to save.
5. Scan the barcode again to check.

Source: Scanning the barcode during scan test, an error symbol appears. (opens in a new window) – CipherLab Technical FAQ (support knowledge base) (official documentation).

Short answer: It all depends on the “Keyboard Emulation” mode in ReaderConfig. By default, “Input Method” enters the barcode as text in the active field; a business application may expect “Key Event” or an “Intent” broadcast. Ask the software publisher which mode it expects.

Likely cause

The ReaderConfig guide offers five modes: “Input Method” (default), “Key Event”, “Intent” (which disables keyboard emulation and sends the data by broadcast), “Intent & KeyEvent” and “Copy & Paste”. If the application is not listening on the right channel, nothing is displayed.

What to do

1. Open ReaderConfig, then the profile in use, Data Output > “Keyboard Emulation” section.
2. Select the mode your application requires (“Key Event” for keystroke-by-keystroke input, “Intent” for an application that receives the data by broadcast).
3. Check that the input field has focus at the time of scanning.
4. Also check “Auto Enter”: by default, a carriage return follows each barcode.

Sources: 2.3.1 Keyboard Emulation (opens in a new window) · 2.3 Data Output (opens in a new window) – ReaderConfig User Guide for Android v1.03 (official documentation).

Short answer: Set up roaming on the RK26 so that it switches earlier to a stronger access point: Settings > WiFi, menu or gear icon, then “Roaming Enable”, “WiFi Trigger” and “Roaming Delta”. If the “No Internet” message appears, test another network to determine whether the access point is at fault.

Likely cause

The RK26 is a Wi-Fi 6 (802.11ax) mobile computer. The CipherLab FAQ on roaming explains that the mobile computer looks for a better access point when the signal falls below the “WiFi Trigger” threshold, and switches if the candidate exceeds the “Roaming Delta” difference. The “No Internet” message generally comes from the access point, according to another FAQ.

What to do

1. Open Settings > WiFi, then the MENU icon or the gear icon at the top right (“Advance” if only MENU appears).
2. Enable “Roaming Enable”.
3. Set “WiFi Trigger” (RSSI threshold in dBm), “Roaming Delta” and the scan interval to suit your network, with your IT department.
4. If “No Internet” appears, connect the mobile computer to another SSID: if it works, the access point is at fault.

CipherLab does not give default values: they depend on the layout of the access points.

Sources: How to set roaming trigger in CipherLab Android devices? (opens in a new window) – CipherLab Technical FAQ (support knowledge base) · [Android] Why my WiFi connection shows "No Internet"? (opens in a new window) – CipherLab Technical FAQ (support knowledge base) · Wi-Fi 6 Rugged Mobile Computer, RK26 Series - CipherLab Co., Ltd. (opens in a new window) – CipherLab product page (official documentation).

Short answer: According to CipherLab, a light that is off means the cable is not connected correctly. Firmly reconnect the USB-C cable or the snap-on cable and check the power adapter. Charging via USB-C is still slower than with the snap-on cable or the cradle.

Likely cause

For charging via the USB-C cable, the RK26 manual describes four light states: solid red from 0 to 94%, solid green from 95 to 100%, flashing red in the event of an error, off if the cable is not connected correctly. The snap-on cable has its own light, with the same colours.

Caution: The manual warns of a risk of explosion if the battery is replaced with an unsuitable type: use only CipherLab batteries and chargers.

What to do

1. Unplug and then reconnect the USB-C cable (or the snap-on cable) and its power adapter.
2. Check that the battery is in place and its latch is locked.
3. The light should turn solid red.
4. Allow about 4 hours for an empty battery; the first charge takes 8 to 12 hours.
5. For faster charging, use the snap-on cable or the cradle rather than USB-C.
6. If it is flashing red, see the light flashes red.

The table in the “Status LED” chapter places the end of charging at 100% and charging in progress from 0 to 95%, while the USB-C charging table gives 95% and 94%.

Sources: 1.2.1 Charge the Mobile Computer (opens in a new window) · 2.4.1 Status LED (opens in a new window) · Important Notices (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 (official documentation).

Short answer: On the RK26 charging and communication cradle, the light only tracks the spare battery; the main battery is shown on the mobile computer's light. Solid red indicates charging in progress, one red flash no battery, flashing red a charging error.

Likely cause

The RK26 manual distinguishes the two lights: the cradle light for the spare battery (solid red while charging, solid green once charged, flashing red on error, one red flash with no battery, off when not charging), and the mobile computer light for the main battery.

What to do

1. Read the right light: cradle for the spare battery, mobile computer for the main battery.
2. One red flash: insert or reinsert the spare battery in its slot.
3. Flashing red: remove the battery, let it return to room temperature, then put it back.
4. Light off: check the cradle's power adapter.

Source: 1.2.1 Charge the Mobile Computer (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 (official documentation).

Short answer: First unplug any cable, then select “Battery Swap” in the power button menu and confirm with “OK”. When the red LED goes off, the RK26 is in standby: change the battery, lock the latch, then turn the display back on with the power button.

Likely cause

The RK26 manual describes a hot swap: the mobile computer goes into standby and lasts at least 5 minutes without its main battery, thanks to its backup battery, which retains the RAM for about 5 minutes according to the Android 14 manual.

Caution: The manual forbids swapping before the system is ready, and while the “Low Sub Battery” notification is displayed.

CipherLab procedure

1. Unplug any mains or USB cable from the mobile computer.
2. Hold down the power button (on top of the mobile computer) and select “Battery Swap”, then “OK”.
3. Wait for the red LED to go off: the mobile computer is fully in standby.
4. Remove the main battery and install a charged battery, within 5 minutes.
5. Check that the latch is locked, then press the power button.

To change the battery without a hot swap, switch off the mobile computer with “Power off” after checking that the backup battery and the new battery are charged.

Sources: 2.1.3 Replace Main Battery (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 · 2.1 Battery (opens in a new window) – RK26 Mobile Computer Reference Manual for Android 14 v1.00 (official documentation).

Short answer: The RK26 warns the user when the battery reaches 55 °C and shuts itself down at 60 °C. Remove the battery, let the unit cool down, and avoid heavy use while charging.

Likely cause

According to the RK26 manual, a heavy workload while charging can cause the battery to swell. The manual recommends “Balance Mode” for a mobile computer that stays on mains power or in a cradle for long periods.

Caution: Do not puncture, crush, disassemble or short-circuit the battery, and do not expose it to water or fire.

What to do

1. As soon as the warning appears, remove the battery and let it cool down away from heat.
2. Do not leave heavy apps running during long charging sessions.
3. For a mobile computer that often sits in its cradle, select “Balance Mode” in the battery settings; the mobile computer restarts by itself to apply the change.

Sources: 2.1.5 Battery Precautions (opens in a new window) · Important Notices (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 (official documentation).

Short answer: “Performance Mode” gives about 10 to 20% more working hours, at the cost of a shorter battery lifespan. Also turn off unused radios, lower the brightness and enable “Battery Saver”.

Likely cause

The RK26's 4000 mAh Li-ion battery is rated for more than 8 hours under CipherLab's test conditions. The manual offers two battery modes (“Balance Mode” and “Performance Mode”) and a series of power-saving settings.

Caution: To store a spare battery, CipherLab asks you to leave it neither full nor empty, between 0 and 30 °C, and to recharge it to 40-60% every 3 months.

What to do

1. Show the battery percentage in Settings > Battery to monitor consumption.
2. Turn off Bluetooth, Wi-Fi, NFC and GPS when they are not in use, or enable Aeroplane mode, which turns off all radios.
3. Shorten the sleep timeout and lower the brightness.
4. Limit background syncing of accounts (email, calendar, contacts).
5. Enable “Battery Saver” and “Battery Optimization”.
6. For more working hours, switch to “Performance Mode”; the mobile computer restarts to apply the mode.

Sources: 2.1.4 Power Management (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 · 2.1.5 Battery Precautions (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 · 2.1.1 Battery Status Indicators (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 · Important Notices (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 · Wi-Fi 6 Rugged Mobile Computer, RK26 Series - CipherLab Co., Ltd. (opens in a new window) – CipherLab product page (official documentation).

Short answer: Open Settings > System > Advanced > Reset options and select “Erase all data (factory reset)”, the path given by the CipherLab FAQ for its Android mobile computers. All data is erased; if the “Require Passcode to Reset or Update” option is enabled, a verification code is required.

Likely cause

The RK26 manual calls this reset “Erase All Data (Factory Reset)”. Its Enterprise Settings app can require a verification code before any reset. The CipherLab FAQ describes the path in the Android settings and points out that a verification code is requested.

Caution: All user data and installed apps are erased.

What to do

1. Copy the files and settings you want to keep.
2. Remove the Google account from the mobile computer to avoid the lock described in Google account requested after the reset.
3. Plug in the mobile computer.
4. Open Settings > System > “Advanced” > “Reset options”.
5. Tap “Erase all data (factory reset)” and confirm.
6. Enter the verification code if requested: your administrator or the CipherLab FAQ will provide it.

The CipherLab FAQ that describes this path cites other Android mobile computers from the brand (RK25, RK95…), not explicitly the RK26.

Sources: How to do Factory Reset in CipherLab Android device? (opens in a new window) – CipherLab Technical FAQ (support knowledge base) · 3.8.4 Require Passcode to Reset or Update (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 · [Android] What to do if my CipherLab Android devices asks Google account password after factory reset? (opens in a new window) – CipherLab Technical FAQ (support knowledge base) (official documentation).

Short answer: The “Require Passcode to Reset or Update” option in Enterprise Settings is enabled. It requires a verification code before any system update or factory reset. It is disabled by default.

Likely cause

The RK26 manual describes this setting in the Enterprise Settings app, which also manages the keypad and the special keys. It protects the mobile computer against an unauthorised reset or update.

What to do

1. Ask your administrator or IT department for the verification code.
2. To check the setting, open Enterprise Settings from the app list.
3. Look at the “Require Passcode to Reset or Update” switch: if it is on, it explains the code request.

Sources: 3.8.4 Require Passcode to Reset or Update (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 · 3.8 Enterprise Settings (opens in a new window) – RK26 Mobile Computer Reference Manual for Android 14 v1.00 (official documentation).

Short answer: Google protection requires the password of the account that was not removed before the reset. Enter it, have the account recovered through the Google procedure, or send the mobile computer to the CipherLab repair centre.

Likely cause

According to the CipherLab FAQ, this lock occurs when the user forgets to sign out of their Google account before the reset.

What to do

1. Enter the address and password of the Google account previously used on the mobile computer.
2. Password lost: from a computer, follow the Google account recovery process.
3. Account cannot be recovered: the CipherLab RMA centre can restore the mobile computer to its factory state.
4. Before any future reset, always remove the Google account.

When to call a technician: if the Google account cannot be recovered: the CipherLab repair centre (RMA) restores the mobile computer to factory defaults.

Source: [Android] What to do if my CipherLab Android devices asks Google account password after factory reset? (opens in a new window) – CipherLab Technical FAQ (support knowledge base) (official documentation).

Short answer: The RK26 only lights LED 2 green on a read if LED notification is enabled in ReaderConfig. Enable “Enable LED when good read” and give it a duration: the default value, 0, disables it. LED 2 flashing white simply indicates a new notification.

Likely cause

The RK26 manual assigns LED 2 to good reads (one green flash) and system notifications (flashing white), and states that the scanner lights require ReaderConfig's LED notification. The ReaderConfig guide sets its duration from 0 to 4 seconds, 0 by default.

What to do

1. Launch ReaderConfig, then open the relevant profile.
2. In the notification settings, enable “Enable LED when good read” with a duration of 1 to 4 seconds.
3. In the same place, check the “Beep when good read” beep (Sound 1 by default, Sound 1 to 9 or mute) and the “Vibrate when good read” vibration, which is disabled by default.
4. Scan again with “Scan Test”.

Sources: 2.4.1 Status LED (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 · 2.4 Notification Settings (opens in a new window) – ReaderConfig User Guide for Android v1.03 (official documentation).

Short answer: According to the ReaderConfig guide, the import fails when the scan engine of the target mobile computer differs from that of the original mobile computer. Compare the scanner type in “About” on both devices.

Likely cause

A ReaderConfig profile contains settings specific to one scan engine. However, the RK26 is available with several engines (SE4750SR, SE4100, SE4750MR, SE5500).

What to do

1. On the original mobile computer, export the profile from its menu (“Export”): it is saved in .json format.
2. On the RK26, open the ReaderConfig main menu > “Import”, select the file and confirm with “OK”.
3. If a profile with the same name exists, confirm that it should be replaced.
4. If it fails, compare the scanner type in “About”; if it differs, recreate the profile manually.

Sources: 1.2.2 Import, 1.3.2 Export, 1.2.6 About (opens in a new window) – ReaderConfig User Guide for Android v1.03 · Wi-Fi 6 Rugged Mobile Computer, RK26 Series - CipherLab Co., Ltd. (opens in a new window) – CipherLab product page (official documentation).

Short answer: CipherLab's FAQ on its Android mobile computers provides for a “hibernation reset”: battery removed, power button held for one minute, battery reinserted, then ten minutes of charging. Only switch the mobile computer on when a percentage is displayed and is above 5 to 10%.

Likely cause

A fully drained battery can prevent start-up and charging. The same FAQ warns that pressing power, volume up and volume down simultaneously for about 2 seconds puts the mobile computer into download mode, in which the charging light no longer comes on.

CipherLab procedure

1. Remove the battery and hold down the power button for about one minute.
2. Reinsert the battery and plug in the mobile computer for about ten minutes.
3. Wait for a percentage to appear on the battery icon.
4. At 5 to 10%, hold down the power button until the home screen appears, then let charging finish.
5. If the mobile computer has been put into download mode by mistake, hold down the power button for more than 15 seconds.

Sources: When devices not power on (opens in a new window) – CipherLab Technical FAQ (support knowledge base) · 1.1.3 Power On/Off Mobile Computer (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 (official documentation).

Short answer: The RK26 is showing its exception screen. Tap “Try Again”; if the screen comes back, CipherLab asks you to save the logs to an SD card so that its support team can analyse the fault.

Likely cause

The CipherLab FAQ “How to collect RK26 logs in Recovery Mode” describes two cases: the exception screen, and the Recovery Mode menu. Log collection works from firmware V2320 onwards.

CipherLab procedure

1. With the mobile computer switched off, insert a working SD card of about 2 GB (the logs rarely exceed 200 MB).
2. Exception screen: tap “Try Again”, then press power, volume down and the right scan key together. The mobile computer restarts on the same screen.
3. Recovery Mode menu: enter it with power then volume up, move to “Dump logs to SD card” with volume down, and confirm with power.
4. Switch off the mobile computer, remove the SD card and copy the “qcom” folder for the support team.

When to call a technician: if the exception screen comes back after “Try Again”: send the logs from the SD card to the support team; a full reinstallation of the system with the QFIL tool in Download mode is covered by a dedicated CipherLab procedure.

Inserting the SD card without restarting is not enough: the logs remain in the mobile computer's memory.

Sources: How to collect RK26 logs in "Recovery Mode" (opens in a new window) · RK26 OS Image Upgrade by QFIL SOP (opens in a new window) – CipherLab Technical FAQ (support knowledge base) (official documentation).

Short answer: The RK26 ships with Android 12 and CipherLab states that it can be upgraded to Android 14. The manual provides for an update over the network, downloaded from the OTA server, and an update via SD card; the mobile computer switches off during installation.

Likely cause

The RK26 manual for Android 14 presents the network update as a download from the OTA server over a wireless connection, and warns that the mobile computer shuts down during the update. If “Require Passcode to Reset or Update” is enabled, a verification code is required.

Caution: Do not interrupt the update: the mobile computer switches off during installation.

What to do

1. Connect the mobile computer to Wi-Fi: the network update uses a wireless connection.
2. Ask your administrator for the verification code if the “Require Passcode to Reset or Update” setting is active.
3. Start the network update and let the mobile computer switch off and restart without interrupting it.

When to call a technician: if the system no longer starts after an update: CipherLab has a full reinstallation procedure using the QFIL tool (driver, QFIL, Download mode), reserved for its support team.

Sources: Wi-Fi 6 Rugged Mobile Computer, RK26 Series - CipherLab Co., Ltd. (opens in a new window) – CipherLab product page · 4.4 OS Update (opens in a new window) – RK26 Mobile Computer Reference Manual for Android 14 v1.00 · 3.8.4 Require Passcode to Reset or Update (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 · RK26 OS Image Upgrade by QFIL SOP (opens in a new window) – CipherLab Technical FAQ (support knowledge base) (official documentation).

Short answer: The CipherLab FAQ recommends clearing the cache, then the data, of the app concerned, from its storage settings. Clearing the data erases the information saved by the app.

Likely cause

According to CipherLab, corrupted app data or cache can cause an Android app to crash or freeze.

CipherLab procedure

1. Open Settings > Apps and select the app.
2. Tap “Storage”.
3. Clear the cache first, then restart the app.
4. If it still crashes, clear its data.

Source: How to do APP data clean or cache clean? (opens in a new window) – CipherLab Technical FAQ (support knowledge base) (official documentation).

Short answer: On the 25-key RK26, CipherLab disables the blue and orange keys with the BarcodeToSetting app: launch it, then scan the two programming barcodes attached to the CipherLab FAQ.

Likely cause

The RK26 manual links the blue key to alphabetic input (“Change Blue Key Input Method” setting in Enterprise Settings). The FAQ “Disable RK26 Blue and Orange key” provides two barcode files to disable the blue and orange keys on the 25-key model.

What to do

1. Open the BarcodeToSetting app on the RK26.
2. Scan the barcodes in the two files attached to the CipherLab FAQ (“Disable Blue Key” and “FN KEY mapping Numbers”).
3. Check that the blue and orange keys no longer have any effect.
4. To change only the behaviour of the Alpha key, use “Change Blue Key Input Method” (Alpha Numeric, Alpha Lowercase, Alpha Uppercase) in Enterprise Settings.

The programming barcodes are supplied as PDFs by CipherLab and are not reproduced here.

Sources: Disable RK26 Blue and Orange key (opens in a new window) – CipherLab Technical FAQ (support knowledge base) · 3.8 Enterprise Settings (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 (official documentation).

Short answer: A shortcut locks the entire RK26 keypad: Shift then Backspace on the 28-key model, Shift then Delete on the 25-key model. The padlock in the status bar confirms it.

Likely cause

The RK26 manual presents this lock as protection against accidental key presses. It states that the shortcut does not work in Alpha mode, where Backspace becomes Delete.

What to do

1. Look for the padlock in the status bar.
2. Identify your keypad: 25 or 28 keys.
3. Exit Alpha mode before using a keyboard shortcut again.
4. If only the Function and Alpha keys or the triggers seem unresponsive in an application, check “Disable Special KeyEvent” in Enterprise Settings (disabled by default).

The manual explains how to activate the lock, not how to release it.

Sources: 3.7 Keypad Lock (opens in a new window) · 3.8 Enterprise Settings (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 (official documentation).

Short answer: Select the right touch mode in Settings > Display > “Touch Mode”: “Glove” for gloves, “Wet finger” in damp weather or drizzle. The default “Normal” mode accepts fingers, gloves and stylus.

Likely cause

The RK26 manual offers three touch modes suited to the conditions of use. “Wet finger” mode only works with bare fingers.

What to do

1. Open the app list > Settings > Display > “Touch Mode”.
2. Select “Glove” if you wear gloves.
3. Select “Wet finger” in drizzle or a humid atmosphere, with bare fingers.
4. Return to “Normal” for everyday use.

Source: 2.3.4 Touch Mode (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 (official documentation).

Short answer: If no keyboard appears, enable “Show virtual keyboard” in the physical keyboard settings. If Gboard keeps stopping, set it as the default keyboard, then clear its cache and data.

Likely cause

The CipherLab FAQs give two causes: the virtual keyboard display setting when a physical keyboard is present, and, for Gboard stopping, a conflict with another default keyboard or corrupted local Gboard files.

What to do

1. Keyboard missing: Settings > System > “Language & input” > “Physical keyboard”, enable “Show virtual keyboard”.
2. Gboard stopping: Settings > System > “Languages & input”, select Gboard as the keyboard.
3. Then Settings > Apps > Gboard > Storage: clear the cache, then the data, and restart.
4. If the problem continues, uninstall the Gboard updates (system app), restart and let it update.

The available on-screen keyboards are managed in Language & input > On-screen keyboard > “Manage keyboard”.

Sources: Why the Android device cannot display virtual keyboard on the screen? (opens in a new window) – CipherLab Technical FAQ (support knowledge base) · How to solve Gboard stops working on Android devices? (opens in a new window) – CipherLab Technical FAQ (support knowledge base) · 2.6.2 On-screen Keyboard (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 (official documentation).

Short answer: This is the native format of EPC codes. To get text, enable “Convert UHF EPC to ASCII” in Enterprise Settings: the conversion only applies if each value corresponds to a visible character.

Likely cause

The RK26 manual describes this setting for the RK26 UHF RFID reader: trailing 00 values are removed first, then the conversion only takes place if the whole code is readable. The UHF reader is a handle that attaches to the mobile computer (more than 700 tags per second at over 8 m with the Impinj R2000 chip, according to the product page).

What to do

1. Open Enterprise Settings from the app list.
2. Enable “Convert UHF EPC to ASCII”.
3. Read a tag again: if it stays in hexadecimal, its code contains values with no visible character and cannot be converted.

Sources: 3.8 Enterprise Settings (opens in a new window) – RK26 Mobile Computer Reference Manual v1.03 · Wi-Fi 6 Rugged Mobile Computer, RK26 Series - CipherLab Co., Ltd. (opens in a new window) – CipherLab product page (official documentation).