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Area: BLEIssues related to BLEIssues related to BLE
Description
Board
ESP32-S3 devkit C1
Device Description
plain module on breadboard
Hardware Configuration
using USB to connect to PC
Version
v3.2.0
IDE Name
VSCode
Operating System
Windows 10
Flash frequency
40Mhz
PSRAM enabled
yes
Upload speed
115200
Description
using BLE library like the example (client.ino)
pChar->registerForNotify(notifyCallback);
after register, not notify is received from callback function. switching to NimBLE works no problem. (same device, characteristic and descriptor).
Sketch
PlatformIO
Debug Message
[BLE] Reading all readable characteristics to trigger controller:
[BLE] Read characteristic 00002a4a-0000-1000-8000-00805f9b34fb length: 4 data: 11 01 00 03
[BLE] Read characteristic 00002a4b-0000-1000-8000-00805f9b34fb length: 283 data: 05 01 09
05 A1 01 85 01 09 01 A1 00 09 30 09 31 15 00 27 FF FF 00 00 95 02 75 10 81 02 C0 09 01 A1
00 09 32 09 35 15 00 27 FF FF 00 00 95 02 75 10 81 02 C0 05 02 09 C5 15 00 26 FF 03 95 01
75 0A 81 02 15 00 25 00 75 06 95 01 81 03 05 02 09 C4 15 00 26 FF 03 95 01 75 0A 81 02 15
00 25 00 75 06 95 01 81 03 05 01 09 39 15 01 25 08 35 00 46 3B 01 66 14 00 75 04 95 01 81
42 75 04 95 01 15 00 25 00 35 00 45 00 65 00 81 03 05 09 19 01 29 0F 15 00 25 01 75 01 95
0F 81 02 15 00 25 00 75 01 95 01 81 03 05 0C 0A B2 00 15 00 25 01 95 01 75 01 81 02 15 00
25 00 75 07 95 01 81 03 05 0F 09 21 85 03 A1 02 09 97 15 00 25 01 75 04 95 01 91 02 15 00
25 00 75 04 95 01 91 03 09 70 15 00 25 64 75 08 95 04 91 02 09 50 66 01 10 55 0E 15 00 26
FF 00 75 08 95 01 91 02 09 A7 15 00 26 FF 00 75 08 95 01 91 02 65 00 55 00 09 7C 15 00 26
FF 00 75 08 95 01 91 02 C0 C0
[BLE] Read characteristic 00002a4d-0000-1000-8000-00805f9b34fb length: 0 data:
[BLE] Read characteristic 00002a4e-0000-1000-8000-00805f9b34fb length: 1 data: 01
[BLE] Attempting to enable notifications on characteristic: 00002a4d-0000-1000-8000-00805f9b34fb
Other Steps to Reproduce
No response
I have checked existing issues, online documentation and the Troubleshooting Guide
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Area: BLEIssues related to BLEIssues related to BLE
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bombzj commentedon Jun 9, 2025
I also tried to run the example in arduino IDE (BLE->Client), the same result.
Code:
// The remote service we wish to connect to.
static BLEUUID serviceUUID("00001812-0000-1000-8000-00805F9B34FB");
// The characteristic of the remote service we are interested in.
static BLEUUID charUUID("00002A4D-0000-1000-8000-00805F9B34FB");
Output:
Forming a connection to a3:e9:3b:92:28:53
The characteristic value was:
We are now connected to the BLE Server.
Setting new characteristic value to "Time since boot: 11"
Setting new characteristic value to "Time since boot: 12"
Setting new characteristic value to "Time since boot: 13"