BLE connection with lilygo t-echo #9376

ZababurinSergei · 2026-01-21T00:28:46Z

ZababurinSergei
Jan 21, 2026

The Bluetooth connection isn't working. I've tried all the firmware versions. The result is the same. The connection keeps dropping.
I read that you can solve the problem by increasing the BLE timeout.
bluetooth.connection_interval
bluetooth.supervision_timeout

But these parameters aren't in the firmware.

How can the problem be solved ?

log file

tio /dev/ttyACM0
[02:30:04.488] tio 3.9
[02:30:04.488] Press ctrl-t q to quit
[02:30:04.489] Connected to /dev/ttyACM0
INFO  | 23:30:03 296 BLE Connected to A03 ###############
DEBUG | 23:30:03 296 BluetoothStatus CONNECTED
INFO  | 23:30:04 297 BLE connection secured
INFO  | 23:30:04 297 CCCD Updated: 1
INFO  | 23:30:04 297 Notify/Indicate enabled
INFO  | 23:30:04 297 CCCD Updated: 2
INFO  | 23:30:04 297 Notify/Indicate enabled
INFO  | 23:30:04 298 toRadioWriteCb data 0x2002793a, len 4
DEBUG | 23:30:04 298 New ToRadio packet
INFO  | 23:30:04 298 Client wants config, nonce=69420
DEBUG | 23:30:04 298 Got 10 files in manifest
INFO  | 23:30:04 298 Start API client config millis=298081
DEBUG | 23:30:04 298 FromRadio=STATE_SEND_MY_INFO
INFO  | 23:30:04 298 getFromRadio=STATE_SEND_UIDATA
DEBUG | 23:30:04 298 Send My NodeInfo
DEBUG | 23:30:05 298 Send device metadata
DEBUG | 23:30:05 299 Send channels 8
DEBUG | 23:30:05 299 Send config: device
DEBUG | 23:30:05 299 Send config: position
DEBUG | 23:30:06 299 Send config: power
DEBUG | 23:30:06 299 Send config: network
DEBUG | 23:30:06 299 Send config: display
DEBUG | 23:30:06 299 Send config: lora
DEBUG | 23:30:06 299 Send config: bluetooth
DEBUG | 23:30:06 299 Send config: security
DEBUG | 23:30:06 300 Send config: sessionkey
DEBUG | 23:30:06 300 Send module config: mqtt
DEBUG | 23:30:06 300 Send module config: serial
DEBUG | 23:30:07 300 Send module config: ext notification
DEBUG | 23:30:07 300 Send module config: store forward
DEBUG | 23:30:07 300 Send module config: range test
DEBUG | 23:30:07 300 Send module config: telemetry
DEBUG | 23:30:07 300 Send module config: canned message
DEBUG | 23:30:07 300 Send module config: audio
DEBUG | 23:30:07 300 Send module config: remote hardware
DEBUG | 23:30:07 301 Send module config: neighbor info
DEBUG | 23:30:07 301 Send module config: ambient lighting
DEBUG | 23:30:07 301 Send module config: detection sensor
DEBUG | 23:30:07 301 Send module config: paxcounter
DEBUG | 23:30:08 301 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:08 301 File: ch1.msgs (1) bytes
DEBUG | 23:30:08 301 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:08 301 File: ch0.msgs (1) bytes
DEBUG | 23:30:08 301 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:08 301 File: settings.data (60) bytes
DEBUG | 23:30:08 301 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:08 301 File: latest.msgs (11) bytes
DEBUG | 23:30:08 301 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:08 301 File: uiconfig.proto (4) bytes
DEBUG | 23:30:08 301 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:08 301 File: config.proto (177) bytes
DEBUG | 23:30:08 301 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:08 301 File: module.proto (116) bytes
DEBUG | 23:30:08 302 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:08 302 File: channels.proto (99) bytes
DEBUG | 23:30:08 302 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:08 302 File: device.proto (122) bytes
DEBUG | 23:30:08 302 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:08 302 File: nodes.proto (253) bytes
DEBUG | 23:30:08 302 FromRadio=STATE_SEND_FILEMANIFEST
INFO  | 23:30:08 302 Config Send Complete millis=302357
INFO  | 23:30:09 302 toRadioWriteCb data 0x2002793a, len 2
DEBUG | 23:30:09 302 New ToRadio packet
DEBUG | 23:30:09 302 Got client heartbeat
DEBUG | 23:30:09 302 FromRadio=STATE_SEND_QUEUE_STATUS, numbytes=6
INFO  | 23:30:09 302 toRadioWriteCb data 0x2002793a, len 4
DEBUG | 23:30:09 302 New ToRadio packet
INFO  | 23:30:09 302 Client wants config, nonce=69421
INFO  | 23:30:09 302 Client only wants node info, skipping other config
DEBUG | 23:30:09 302 Got 10 files in manifest
INFO  | 23:30:09 302 Start API client config millis=302853
DEBUG | 23:30:09 302 Send My NodeInfo
INFO  | 23:30:09 302 BLE notify fromNum
DEBUG | 23:30:09 302 Done sending 1 of 1 nodeinfos millis=302987
DEBUG | 23:30:09 302 FromRadio=STATE_SEND_FILEMANIFEST
INFO  | 23:30:09 302 Config Send Complete millis=302989
INFO  | 23:30:12 305 [DeviceTelemetry] Send: air_util_tx=0.089306, channel_utilization=0.000000, battery_level=101, voltage=4.830000, uptime=305
DEBUG | 23:30:12 305 [DeviceTelemetry] Partially randomized packet id 2200458849
DEBUG | 23:30:12 305 [DeviceTelemetry] updateTelemetry LOCAL
DEBUG | 23:30:12 305 [DeviceTelemetry] Node status update: 0 online, 1 total
INFO  | 23:30:12 305 [DeviceTelemetry] Send packet to phone
INFO  | 23:30:12 305 Tell client we have new packets 8
INFO  | 23:30:12 305 BLE notify fromNum
DEBUG | 23:30:14 307 [Power] Battery: usbPower=1, isCharging=1, batMv=4831, batPct=100
INFO  | 23:30:14 308 BLE Disconnected, reason = 0x8
DEBUG | 23:30:14 308 PhoneAPI::close()
DEBUG | 23:30:14 308 BluetoothStatus DISCONNECTED
INFO  | 23:30:16 309 BLE Connected to A03 ###############
DEBUG | 23:30:16 309 BluetoothStatus CONNECTED
INFO  | 23:30:16 310 BLE connection secured
INFO  | 23:30:16 310 CCCD Updated: 2
INFO  | 23:30:16 310 Notify/Indicate enabled
INFO  | 23:30:17 310 CCCD Updated: 1
INFO  | 23:30:17 310 Notify/Indicate enabled
INFO  | 23:30:17 311 toRadioWriteCb data 0x2002793a, len 4
DEBUG | 23:30:17 311 New ToRadio packet
INFO  | 23:30:17 311 Client wants config, nonce=69420
DEBUG | 23:30:17 311 Got 10 files in manifest
INFO  | 23:30:17 311 Start API client config millis=311267
DEBUG | 23:30:17 311 FromRadio=STATE_SEND_MY_INFO
INFO  | 23:30:18 311 getFromRadio=STATE_SEND_UIDATA
DEBUG | 23:30:18 311 Send My NodeInfo
DEBUG | 23:30:18 311 Send device metadata
DEBUG | 23:30:18 312 Send channels 8
DEBUG | 23:30:19 312 Send config: device
DEBUG | 23:30:19 312 Send config: position
DEBUG | 23:30:19 312 Send config: power
DEBUG | 23:30:19 312 Send config: network
DEBUG | 23:30:19 312 Send config: display
DEBUG | 23:30:19 312 Send config: lora
DEBUG | 23:30:19 312 Send config: bluetooth
DEBUG | 23:30:19 313 Send config: security
DEBUG | 23:30:19 313 Send config: sessionkey
DEBUG | 23:30:19 313 Send module config: mqtt
DEBUG | 23:30:20 313 Send module config: serial
DEBUG | 23:30:20 313 Send module config: ext notification
DEBUG | 23:30:20 313 Send module config: store forward
DEBUG | 23:30:20 313 Send module config: range test
DEBUG | 23:30:20 313 Send module config: telemetry
DEBUG | 23:30:20 313 Send module config: canned message
DEBUG | 23:30:20 314 Send module config: audio
DEBUG | 23:30:20 314 Send module config: remote hardware
DEBUG | 23:30:20 314 Send module config: neighbor info
DEBUG | 23:30:20 314 Send module config: ambient lighting
DEBUG | 23:30:21 314 Send module config: detection sensor
DEBUG | 23:30:21 314 Send module config: paxcounter
DEBUG | 23:30:21 314 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:21 314 File: ch1.msgs (1) bytes
DEBUG | 23:30:21 314 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:21 314 File: ch0.msgs (1) bytes
DEBUG | 23:30:21 314 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:21 314 File: settings.data (60) bytes
DEBUG | 23:30:21 314 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:21 314 File: latest.msgs (11) bytes
DEBUG | 23:30:21 315 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:21 315 File: uiconfig.proto (4) bytes
DEBUG | 23:30:21 315 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:21 315 File: config.proto (177) bytes
DEBUG | 23:30:21 315 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:21 315 File: module.proto (116) bytes
DEBUG | 23:30:21 315 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:21 315 File: channels.proto (99) bytes
DEBUG | 23:30:21 315 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:21 315 File: device.proto (122) bytes
DEBUG | 23:30:22 315 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:22 315 File: nodes.proto (253) bytes
DEBUG | 23:30:22 315 FromRadio=STATE_SEND_FILEMANIFEST
INFO  | 23:30:22 315 Config Send Complete millis=315543
DEBUG | 23:30:22 315 FromRadio=STATE_SEND_PACKETS
DEBUG | 23:30:22 315 phone downloaded packet (id=0x83285661 fr=0xf7350a84 to=0xffffffff, transport = 0, WantAck=0, HopLim=5 Ch=0x0 Portnum=67 priority=10)
INFO  | 23:30:22 315 toRadioWriteCb data 0x2002793a, len 2
DEBUG | 23:30:22 315 New ToRadio packet
DEBUG | 23:30:22 315 Got client heartbeat
DEBUG | 23:30:22 315 FromRadio=STATE_SEND_QUEUE_STATUS, numbytes=6
INFO  | 23:30:22 316 toRadioWriteCb data 0x2002793a, len 4
DEBUG | 23:30:22 316 New ToRadio packet
INFO  | 23:30:22 316 Client wants config, nonce=69421
INFO  | 23:30:22 316 Client only wants node info, skipping other config
DEBUG | 23:30:22 316 Got 10 files in manifest
INFO  | 23:30:22 316 Start API client config millis=316129
DEBUG | 23:30:22 316 Send My NodeInfo
INFO  | 23:30:22 316 BLE notify fromNum
DEBUG | 23:30:22 316 Done sending 1 of 1 nodeinfos millis=316308
DEBUG | 23:30:22 316 FromRadio=STATE_SEND_FILEMANIFEST
INFO  | 23:30:22 316 Config Send Complete millis=316310
INFO  | 23:30:28 321 BLE Disconnected, reason = 0x8
DEBUG | 23:30:28 321 PhoneAPI::close()
DEBUG | 23:30:28 321 BluetoothStatus DISCONNECTED
INFO  | 23:30:29 322 BLE Connected to A03 ###############
DEBUG | 23:30:29 322 BluetoothStatus CONNECTED
INFO  | 23:30:30 323 BLE connection secured
INFO  | 23:30:30 323 CCCD Updated: 2
INFO  | 23:30:30 323 Notify/Indicate enabled
INFO  | 23:30:30 323 CCCD Updated: 1
INFO  | 23:30:30 323 Notify/Indicate enabled
INFO  | 23:30:30 323 toRadioWriteCb data 0x2002793a, len 4
DEBUG | 23:30:30 323 New ToRadio packet
INFO  | 23:30:30 323 Client wants config, nonce=69420
DEBUG | 23:30:30 324 Got 10 files in manifest
INFO  | 23:30:30 324 Start API client config millis=324001
DEBUG | 23:30:30 324 FromRadio=STATE_SEND_MY_INFO
INFO  | 23:30:30 324 getFromRadio=STATE_SEND_UIDATA
DEBUG | 23:30:30 324 Send My NodeInfo
DEBUG | 23:30:30 324 Send device metadata
DEBUG | 23:30:31 325 Send channels 8
DEBUG | 23:30:31 325 Send config: device
DEBUG | 23:30:31 325 Send config: position
DEBUG | 23:30:31 325 Send config: power
DEBUG | 23:30:32 325 Send config: network
DEBUG | 23:30:32 325 Send config: display
DEBUG | 23:30:32 325 Send config: lora
DEBUG | 23:30:32 325 Send config: bluetooth
DEBUG | 23:30:32 325 Send config: security
DEBUG | 23:30:32 325 Send config: sessionkey
DEBUG | 23:30:32 326 Send module config: mqtt
DEBUG | 23:30:32 326 Send module config: serial
DEBUG | 23:30:32 326 Send module config: ext notification
DEBUG | 23:30:32 326 Send module config: store forward
DEBUG | 23:30:33 326 Send module config: range test
DEBUG | 23:30:33 326 Send module config: telemetry
DEBUG | 23:30:33 326 Send module config: canned message
DEBUG | 23:30:33 326 Send module config: audio
DEBUG | 23:30:33 326 Send module config: remote hardware
DEBUG | 23:30:33 326 Send module config: neighbor info
DEBUG | 23:30:33 327 Send module config: ambient lighting
DEBUG | 23:30:33 327 Send module config: detection sensor
DEBUG | 23:30:33 327 Send module config: paxcounter
DEBUG | 23:30:33 327 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:33 327 File: ch1.msgs (1) bytes
DEBUG | 23:30:33 327 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:33 327 File: ch0.msgs (1) bytes
DEBUG | 23:30:34 327 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:34 327 File: settings.data (60) bytes
DEBUG | 23:30:34 327 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:34 327 File: latest.msgs (11) bytes
DEBUG | 23:30:34 327 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:34 327 File: uiconfig.proto (4) bytes
DEBUG | 23:30:34 327 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:34 327 File: config.proto (177) bytes
DEBUG | 23:30:34 327 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:34 327 File: module.proto (116) bytes
DEBUG | 23:30:34 327 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:34 327 File: channels.proto (99) bytes
DEBUG | 23:30:34 328 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:34 328 File: device.proto (122) bytes
DEBUG | 23:30:34 328 FromRadio=STATE_SEND_FILEMANIFEST
DEBUG | 23:30:34 328 File: nodes.proto (253) bytes
DEBUG | 23:30:34 328 FromRadio=STATE_SEND_FILEMANIFEST
INFO  | 23:30:34 328 Config Send Complete millis=328189
INFO  | 23:30:34 328 toRadioWriteCb data 0x2002793a, len 2
DEBUG | 23:30:34 328 New ToRadio packet
DEBUG | 23:30:34 328 Got client heartbeat
DEBUG | 23:30:35 328 FromRadio=STATE_SEND_QUEUE_STATUS, numbytes=6
INFO  | 23:30:35 328 toRadioWriteCb data 0x2002793a, len 4
DEBUG | 23:30:35 328 New ToRadio packet
INFO  | 23:30:35 328 Client wants config, nonce=69421
INFO  | 23:30:35 328 Client only wants node info, skipping other config
DEBUG | 23:30:35 328 Got 10 files in manifest
INFO  | 23:30:35 328 Start API client config millis=328684
DEBUG | 23:30:35 328 Send My NodeInfo
INFO  | 23:30:35 328 BLE notify fromNum
DEBUG | 23:30:35 328 Done sending 1 of 1 nodeinfos millis=328818
DEBUG | 23:30:35 328 FromRadio=STATE_SEND_FILEMANIFEST
INFO  | 23:30:35 328 Config Send Complete millis=328820
INFO  | 23:30:40 333 BLE Disconnected, reason = 0x8
DEBUG | 23:30:40 333 PhoneAPI::close()
DEBUG | 23:30:40 333 BluetoothStatus DISCONNECTED
INFO  | 23:30:42 335 BLE Connected to

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BLE connection with lilygo t-echo #9376

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BLE connection with lilygo t-echo #9376

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ZababurinSergei Jan 21, 2026

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ZababurinSergei
Jan 21, 2026