BangleApps [apploader] Can't connect to Bangle.js on Ubuntu

Affected hardware version

Bangle 2

Your firmware version

2v23

The bug

When connecting to Bangle.js 2 from the App Loader and Espruino Web IDE I get an immidiate connection drop with a toast popping up saying

<TOAST>[error] Device connection failed,

and no further info is provided like usual. Reading the logs in devtools (attached below) reveals the problem is most likely related to

GATT Server is disconnected. Cannot retrieve services. (Re)connect first with `device.gatt.connect`

More context

While this bug occurs on a Ubuntu derivative (Linux username 5.15.0-107-generic #117~20.04.1-Ubuntu SMP Tue Apr 30 10:35:57 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux) in Google Chrome 126.0.6478.61, the connection is just fine while using Windows 11 on the same machine (both App Loader and Web IDE work).

I used to be able to do this on the same distro until I installed a firmware update to 2v23 (I am not entirely sure what was the previous version, but I think it was probably 2v17).

Shortly after the update I got a similar error to https://github.com/espruino/BangleApps/issues/631, which was fixed by resetting the Bangle. After that I was not able to connect using Chrome in Ubuntu.

Devtools logs

App Loader

=============================================
comms.js:3 Type 'Puck.debug=3' for full BLE debug info
comms.js:4 =============================================
espruinotools.js:5031 GET window.localStorage = null
espruinotools.js:54 Initialising Notifications
espruinotools.js:54 Initialising Status
espruinotools.js:54 Initialising Utils
espruinotools.js:54 Initialising Config
espruinotools.js:54 Initialising Serial
espruinotools.js:54 Initialising CodeWriter
espruinotools.js:54 Initialising Modules
espruinotools.js:54 Initialising Env
espruinotools.js:54 Initialising Compiler
espruinotools.js:54 Initialising Assembler
espruinotools.js:54 Initialising GetGitHub
espruinotools.js:54 Initialising Minify
espruinotools.js:54 Initialising CoreModules
espruinotools.js:54 Initialising Pretokenise
espruinotools.js:54 Initialising SaveOnSend
espruinotools.js:54 Initialising SetTime
pwa.js:5 👍 beforeinstallprompt BeforeInstallPromptEvent {isTrusted: true, platforms: Array(1), userChoice: Promise, type: 'beforeinstallprompt', target: Window, …}
Puck.debug=3
3
loader.js:190 Chosen device BANGLEJS2
puck.js:212 Web Bluetooth is experimental on this platform. See https://github.com/WebBluetoothCG/web-bluetooth/blob/main/implementation-status.md
puck.js:409 <BLE> Device Name:       Bangle.js d2bc
puck.js:409 <BLE> Device ID:         bp93cz5jt+0LdCn7PfA33Q==
puck.js:409 <BLE> Connected
puck.js:409 <BLE> Disconnected (gattserverdisconnected)
ui.js:86 <TOAST>[error] Device connection failed, 
puck.js:409 <BLE> ERROR: NetworkError: GATT Server is disconnected. Cannot retrieve services. (Re)connect first with `device.gatt.connect`

Espruino Web IDE

No chrome.serial - Chrome Serial disabled
index.js:96721 No chrome.sockets - Chrome Socket disabled
index.js:96721 serial_frame: Not running inside an iframe
index.js:96721 Remote Connection enabled
index.js:96721 UTF8 Library loaded successfully
index.js:96721 No chrome.storage API - disabling Offline mode
index.js:96721 GET window.localStorage = "{\"BAUD_RATE\":9600,\"SERIAL_IGNORE\":\"/dev/ttyS*|/dev/*.SOC|/dev/*.MALS\",\"SERIAL_FLOW_CONTROL\":true,\"SERIAL_AUDIO\":\"0\",\"WEB_BLUETOOTH\":true,\"WEB_SERIAL\":true,\"EMULATOR_BANGLEJS\":true,\"RELAY_KEY\":\"\",\"WEBRTC_BRIDGE_ID\":\"\",\"RESET_BEFORE_SEND\":true,\"STORE_LINE_NUMBERS\":true,\"MODULE_URL\":\"https://www.espruino.com/modules\",\"MODULE_EXTENSIONS\":\".min.js|.js\",\"MODULE_AS_FUNCTION\":true,\"MODULE_PROXY_ENABLED\":false,\"MODULE_PROXY_URL\":\"\",\"MODULE_PROXY_PORT\":\"\",\"ENV_ON_CONNECT\":true,\"BLOCKLY_TO_JS\":false,\"BLOCKLY_LANGUAGE\":\"en\",\"BLOCKLY_EXTENSIONS\":\"|bluetooth|robot|\",\"KEYMAP\":\"sublime\",\"THEME\":\"default\",\"INDENTATION_TYPE\":\"spaces\",\"TAB_SIZE\":2,\"DISABLE_CODE_HINTS\":false,\"BOARD_JSON_URL\":\"https://www.espruino.com/json\",\"SERIAL_THROTTLE_SEND\":0,\"COMPILATION\":true,\"COMPILATION_URL\":\"https://www.espruino.com/service/compiler\",\"UNICODE\":false,\"MINIFICATION_LEVEL\":\"\",\"MODULE_MINIFICATION_LEVEL\":\"ESPRIMA\",\"MINIFICATION_Mangle\":true,\"SHOW_WEBCAM_ICON\":0,\"WEBCAM_CONSTRAINTS\":0,\"FONT_SIZE\":12,\"UI_MODE\":\"Normal\",\"SHOW_CODE_LINK_ICON\":false,\"ENABLE_Testing\":false,\"Sound_Success\":\"\",\"Sound_Warning\":\"\",\"Sound_Error\":\"\",\"Sound_Info\":\"\",\"Speak_Success\":false,\"Speak_Warning\":false,\"Speak_Error\":false,\"Speak_Info\":false,\"SHOW_TERMINAL_LOGGER_ICON\":false,\"TERMINAL_LOGGER_SAVE_TO_LOCALSTORAGE\":false,\"PRETOKENISE\":false,\"SAVE_ON_SEND\":0,\"SAVE_STORAGE_FILE\":\"\",\"LOAD_STORAGE_FILE\":2,\"SET_TIME_ON_WRITE\":true,\"NOT_FIRST_RUN\":true,\"WEB_BLUETOOTH_FILTER\":\"\"}"
index.js:96721 Initialising SettingsConsole
index.js:96721 Initialising Utils
index.js:96721 Initialising Config
index.js:96721 Initialising HTML
index.js:96721 Initialising Notifications
index.js:96721 Initialising Status
index.js:96721 Initialising App
index.js:96721 Initialising File
index.js:96721 Initialising Serial
index.js:96721   - Initialising Serial Web Audio
index.js:96721   - Initialising Serial Web Bluetooth
index.js:96721 BT> bluetooth.getDevices exists - grab known devices
index.js:100534 Web Bluetooth is experimental on this platform. See https://github.com/WebBluetoothCG/web-bluetooth/blob/main/implementation-status.md
index.js:96721   - Initialising Serial Web Serial
index.js:96721 Serial> serial.getPorts exists - grab known devices
index.js:96721   - Initialising Serial Remote Connection
index.js:96721   - Initialising Serial Emulator
index.js:96721 Initialising RemoteConnection
index.js:96721 Initialising Terminal
index.js:96721 Initialising CodeWriter
index.js:96721 Initialising Modules
index.js:96721 Initialising Env
index.js:96721 Initialising Flasher
index.js:96721 Initialising FlasherESP8266
index.js:96721 Initialising EditorBlockly
index.js:96721 Initialising EditorJavaScript
index.js:96721 Initialising Send
index.js:96721 Initialising MenuPortSelector
index.js:96721 Initialising MenuSettings
index.js:96721 Initialising MenuFlasher
index.js:96721 Initialising SettingsAbout
index.js:96721 Initialising SettingsFlasher
index.js:96721 Initialising BoardJSON
index.js:96721 Initialising VersionChecker
index.js:96721 Initialising Compiler
index.js:96721 Initialising Assembler
index.js:96721 Initialising GetGitHub
index.js:96721 Initialising Unicode
index.js:96721 Initialising Minify
index.js:96721 Initialising Tutorial
index.js:96721 Initialising Webcam
index.js:96721 Initialising FontSize
index.js:96721 Initialising UiMode
index.js:96721 Initialising URLHandler
index.js:96721 Initialising CodeLink
index.js:96721 Initialising Testing
index.js:96721 Initialising Notification_Sound
index.js:96721 Initialising Tern
index.js:96721 Initialising Debugger
index.js:96721 Initialising Tour
index.js:96721 Initialising SettingsProfile
index.js:96721 Initialising HelpLinks
index.js:96721 Initialising Arrows
index.js:96721 Initialising Storage
index.js:96721 Initialising KeyShortcuts
index.js:96721 Initialising TerminalLogger
index.js:96721 Initialising CoreModules
index.js:96721 Initialising Pretokenise
index.js:96721 Initialising SaveOnSend
index.js:96721 Initialising SetTime
index.js:96721 serviceworker> active
blockly_espruino.js:38 window.onload ?lang=en&Enable=%7Cbluetooth%7Crobot%7C
index.js:96721 Handling URL "https://www.espruino.com/ide/"
index.js:96721 >>> Connecting...
index.js:96721 Set Slow Write = true ('Throttle Send'='Auto')
index.js:96721 BT> Starting device chooser
index.js:100586 Web Bluetooth is experimental on this platform. See https://github.com/WebBluetoothCG/web-bluetooth/blob/main/implementation-status.md
index.js:96721 >>> Connecting to Bangle.js d2bc
index.js:96721 BT>  Device Name:       Bangle.js d2bc
index.js:96721 BT>  Device ID:         S2Rn1mZ79sFvxtZtyslUBw==
index.js:96721 >>> Connected to BLE
index.js:96721 BT> Connected
index.js:96721 BT> Disconnected (gattserverdisconnected)
index.js:96731 [notify_error] Connection Failed.
(anonymous) @ index.js:96731
error @ index.js:98122
(anonymous) @ index.js:104680
(anonymous) @ index.js:99648
closeSerial @ index.js:100660
(anonymous) @ index.js:100599
index.js:96721 >>> Connection Failed.
index.js:96721 BT> ERROR: NetworkError: GATT Server is disconnected. Cannot retrieve services. (Re)connect first with `device.gatt.connect`.

Steps attempted to fix

Multiple restarts and resets
Restarting the bluetooth service with /etc/init.d/bluetooth restart
Setting different combinations of "Programmable / BLE / HID"
Trying the connection in incognito mode to make sure no browser extensions mess it up

Let me know if I can provide more info to help! Thank you.

Installed apps

boot (0.62), daisy (0.11), antonclk (0.11), widlock (0.08), widid (0.03), welcome (0.14), calculator (0.07), widbt (0.09), dvdbounce (0.01), warsawjs (undefined), widbat (0.12), pomodo (0.02), calendar (0.18), linuxclock (0.06), widalarm (0.02), flipper (undefined), hidmsicswipe (0.01), launch (0.21), sched (0.26), mylocation (0.11), notify (0.14), clock_info (0.12), setting (0.72), alarm (0.48), health (0.30), pebble (0.11), impwclock (0.07), slevel (0.04), sched (0.26), files (0.08), qrcode (0.06), about (0.15), recorder (0.43), run (0.19)

Jul 04 '24 16:07 mkrl

Could be related to #2913 - have a look if any versions match up :)

Jul 04 '24 17:07 bobrippling

That might just be it @bobrippling, thank you!

I'll give it a try, I think I might have done a kernel update recently while not connecting Bangle for a long time before so this could be a coincidence.

However, I still have some suspicions because I was able to connect before a firmware update (in order to do the update in the first place) and then not able to connect directly after updating.

Jul 04 '24 17:07 mkrl

Leaving some links in case they'd help: https://www.espruino.com/Troubleshooting+Bangle.js https://www.espruino.com/Firmware+Update#nrf52 https://www.espruino.com/Troubleshooting+BLE https://forum.espruino.com/conversations/373768/

Jul 04 '24 17:07 thyttan