Troubleshooting • Re: HM-10 does not talk to raspi 5

Hi,

it worked once but never again.

> v

Read services
AVAILABLE DEVICES
1 - My Pi 12 - Pictail LE
4 - Windows PC 5 - Galaxy
7 - LE device 8 - nRF52840
10 - Android phone 1001 - LE A8:E2:C1:46:4D:95
9 - HC-05 1000 - Local
2 - My Other Pi
Input node (x=cancel)
? 1001
Reading LE services from LE A8:E2:C1:46:4D:95.........
Characteristics saved to device info
ctic
index LE Characteristics
0 Device Name 4 byte Permit 02 r Handle=0003 UUID=2A00
1 Appearance 2 byte Permit 02 r Handle=0005 UUID=2A01
2 Peripheral Privacy Flag 1 byte Permit 0A rwa Handle=0007 UUID=2A02
3 Reconnection Address ? byte Permit 08 wa Handle=0009 UUID=2A03
4 Pref Connection Parameters 8 byte Permit 02 r Handle=000B UUID=2A04
5 Service Changed ? byte Permit 20 i Handle=000E UUID=2A05
6 System ID 8 byte Permit 02 r Handle=0012 UUID=2A23
7 Model Number String 13 byte Permit 02 r Handle=0014 UUID=2A24
8 Serial Number String 14 byte Permit 02 r Handle=0016 UUID=2A25
9 Firmware Revision String 18 byte Permit 02 r Handle=0018 UUID=2A26
10 Hardware Revision String 18 byte Permit 02 r Handle=001A UUID=2A27
11 Software Revision String 18 byte Permit 02 r Handle=001C UUID=2A28
12 Manufacturer Name String 18 byte Permit 02 r Handle=001E UUID=2A29
13 IEEE 11073-20601 List 14 byte Permit 02 r Handle=0020 UUID=2A2A
14 PnP ID 7 byte Permit 02 r Handle=0022 UUID=2A50
15 FFE1 UUID 20 byte Permit 1E ??n Handle=0025 UUID=FFE1

Now I either get

CONNECTION COMPLETE TIME
After connecting, some LE servers need more time to complete
Time in ms (x=cancel)
? 0
Connect OK as LE client
> v
Read services
AVAILABLE DEVICES
1001 - LE 09:80:95:F4:57:E1
1002 - LE A8:E2:C1:46:4D:95
1003 - LE 0C:1F:B6:F4:B8:84
1000 - Local
Input node (x=cancel)
? 1002
LE A8:E2:C1:46:4D:95 has disconnected
Reading LE services from LE A8:E2:C1:46:4D:95..Not connected
None found
No characteristics - Read services to find

or

> c
AVAILABLE DEVICES
1001 - LE 09:80:95:F4:57:E1
1002 - LE A8:E2:C1:46:4D:95
1003 - LE 0C:1F:B6:F4:B8:84
Input node (x=cancel)
? 1002
CONNECTION COMPLETE TIME
Time in ms (x=cancel)
? 750
Connect OK as LE client
LE A8:E2:C1:46:4D:95 has disconnected

In both cases the LED keeps blinking, meaning no connection.

THX
Cheers
Detlef

Statistics: Posted by DetlefS — Tue Mar 25, 2025 7:20 pm

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