I’m trying to get my Bosch Climate 5000i AC to work with an ESP8266 using ESPHome, but I’m facing some issues with the UART communication. Here’s what I have:
ESP8266 with CH340G AC’s UART sends 5V signals; ESP8266 works with 3.3V
Can somebody help me, please? I have tried with both ESP32 and ESP8266 boards and i get the same TX error.
I’ve connected TX/RX directly, but I think I need a level shifter. Can someone guide me on how to properly connect a 2-channel bidirectional level shifter in this setup? Any wiring diagrams or detailed instructions would be greatly appreciated.
Datasheet: NodeMCU v3 high resolution pinout and specs – Renzo Mischianti
Karosm
June 13, 2024, 7:17pm
2
If you don’t have patience to insert your logs in readable format, do you really expect that others have patience for trying to read them?
Here it is:
INFO ESPHome 2024.5.5
INFO Reading configuration /config/esphome/bosch3.yaml...
INFO Starting log output from 192.168.50.103 using esphome API
INFO Successfully connected to bosch3 @ 192.168.50.103 in 0.010s
INFO Successful handshake with bosch3 @ 192.168.50.103 in 2.879s
[09:41:32][I][app:100]: ESPHome version 2024.5.5 compiled on Jun 13 2024, 18:41:31
WARNING bosch3 @ 192.168.50.103: Connection error occurred: [Errno 104] Connection reset by peer
INFO Processing unexpected disconnect from ESPHome API for bosch3 @ 192.168.50.103
WARNING Disconnected from API
INFO Successfully connected to bosch3 @ 192.168.50.103 in 0.004s
INFO Successful handshake with bosch3 @ 192.168.50.103 in 2.406s
[09:42:36][D][ApplianceBase:139]: Response timeout...
[09:42:36][D][ApplianceBase:146]: Sending request again. Attempts left: 2...
[09:42:36][D][ApplianceBase:162]: TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 16 77 4E
[09:42:38][D][ApplianceBase:139]: Response timeout...
[09:42:38][D][ApplianceBase:146]: Sending request again. Attempts left: 1...
[09:42:38][D][ApplianceBase:162]: TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 16 77 4E
[09:42:40][D][ApplianceBase:139]: Response timeout...
[09:42:40][D][ApplianceBase:154]: Destroying the request...
[09:42:40][D][AirConditioner:178]: Enqueuing a GET_STATUS(0x41) request...
[09:42:40][D][ApplianceBase:173]: Enqueuing the request...
[09:42:40][D][ApplianceBase:075]: Getting and sending a request from the queue...
[09:42:40][D][ApplianceBase:162]: TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 17 29 9B
[09:42:42][D][ApplianceBase:139]: Response timeout...
[09:42:42][D][ApplianceBase:146]: Sending request again. Attempts left: 2...
[09:42:42][D][ApplianceBase:162]: TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 17 29 9B
[09:42:43][D][AirConditioner:132]: Enqueuing a GET_POWERUSAGE(0x41) request...
[09:42:43][D][ApplianceBase:173]: Enqueuing the request...
[09:42:44][D][ApplianceBase:139]: Response timeout...
[09:42:44][D][ApplianceBase:146]: Sending request again. Attempts left: 1...
[09:42:44][D][ApplianceBase:162]: TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 17 29 9B
[09:42:46][D][ApplianceBase:139]: Response timeout...
[09:42:46][D][ApplianceBase:154]: Destroying the request...
[09:42:46][D][ApplianceBase:075]: Getting and sending a request from the queue...
[09:42:46][D][ApplianceBase:162]: TX: AA 22 AC 8E 00 00 00 00 00 03 41 21 01 44 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 18 48 96
[09:42:48][D][ApplianceBase:139]: Response timeout...
[09:42:48][D][ApplianceBase:146]: Sending request again. Attempts left: 2...
[09:42:48][D][ApplianceBase:162]: TX: AA 22 AC 8E 00 00 00 00 00 03 41 21 01 44 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 18 48 96
[09:42:50][D][ApplianceBase:139]: Response timeout...
[09:42:50][D][ApplianceBase:146]: Sending request again. Attempts left: 1...
[09:42:50][D][ApplianceBase:162]: TX: AA 22 AC 8E 00 00 00 00 00 03 41 21 01 44 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 18 48 96
[09:42:52][D][ApplianceBase:139]: Response timeout...
[09:42:52][D][ApplianceBase:154]: Destroying the request...
[09:42:52][D][AirConditioner:178]: Enqueuing a GET_STATUS(0x41) request...
[09:42:52][D][ApplianceBase:173]: Enqueuing the request...
[09:42:52][D][ApplianceBase:075]: Getting and sending a request from the queue...
[09:42:52][D][ApplianceBase:162]: TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 19 36 8C
[09:42:54][D][ApplianceBase:139]: Response timeout...
[09:42:54][D][ApplianceBase:146]: Sending request again. Attempts left: 2...
[09:42:54][D][ApplianceBase:162]: TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 19 36 8C
[09:42:56][D][ApplianceBase:139]: Response timeout...
[09:42:56][D][ApplianceBase:146]: Sending request again. Attempts left: 1...
[09:42:56][D][ApplianceBase:162]: TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 19 36 8C
[09:42:58][D][ApplianceBase:139]: Response timeout...
[09:42:58][D][ApplianceBase:154]: Destroying the request...
[09:42:58][D][AirConditioner:178]: Enqueuing a GET_STATUS(0x41) request...
[09:42:58][D][ApplianceBase:173]: Enqueuing the request...
[09:42:58][D][ApplianceBase:075]: Getting and sending a request from the queue...
[09:42:58][D][ApplianceBase:162]: TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 1A D4 ED
[09:43:00][D][ApplianceBase:139]: Response timeout...
[09:43:00][D][ApplianceBase:146]: Sending request again. Attempts left: 2...
[09:43:00][D][ApplianceBase:162]: TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 1A D4 ED
[09:43:02][D][ApplianceBase:139]: Response timeout...
[09:43:02][D][ApplianceBase:146]: Sending request again. Attempts left: 1...
[09:43:02][D][ApplianceBase:162]: TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 1A D4 ED
[09:43:04][D][ApplianceBase:139]: Response timeout...
[09:43:04][D][ApplianceBase:154]: Destroying the request...
[09:43:04][D][AirConditioner:178]: Enqueuing a GET_STATUS(0x41) request...
[09:43:04][D][ApplianceBase:173]: Enqueuing the request...
[09:43:04][D][ApplianceBase:075]: Getting and sending a request from the queue...
[09:43:04][D][ApplianceBase:162]: TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 1B 8A 36
[09:43:06][D][ApplianceBase:139]: Response timeout...
[09:43:06][D][ApplianceBase:146]: Sending request again. Attempts left: 2...
[09:43:06][D][ApplianceBase:162]: TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 1B 8A 36
[09:43:07][D][text_sensor:064]: 'Uptime Human Readable': Sending state '3m 55s'
[09:43:07][D][sensor:093]: 'Uptime Sensor': Sending state 235.05099 s with 0 decimals of accuracy
[09:43:08][D][ApplianceBase:139]: Response timeout...
[09:43:08][D][ApplianceBase:146]: Sending request again. Attempts left: 1...
[09:43:08][D][ApplianceBase:162]: TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 1B 8A 36
[09:43:10][D][ApplianceBase:139]: Response timeout...
[09:43:10][D][ApplianceBase:154]: Destroying the request...
[09:43:10][D][AirConditioner:178]: Enqueuing a GET_STATUS(0x41) request...
[09:43:10][D][ApplianceBase:173]: Enqueuing the request...
[09:43:10][D][ApplianceBase:075]: Getting and sending a request from the queue...
[09:43:10][D][ApplianceBase:162]: TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 1C 09 B6
[09:43:12][D][ApplianceBase:139]: Response timeout...
[09:43:12][D][ApplianceBase:146]: Sending request again. Attempts left: 2...
[09:43:12][D][ApplianceBase:162]: TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 1C 09 B6
[09:43:12][D][ApplianceBase:129]: Enqueuing a DEVICE_NETWORK(0x0D) notification...
[09:43:12][D][ApplianceBase:173]: Enqueuing the request...
[09:43:13][D][sensor:093]: 'Climate Sala WiFi Signal': Sending state -78.00000 dBm with 0 decimals of accuracy
[09:43:13][D][AirConditioner:132]: Enqueuing a GET_POWERUSAGE(0x41) request...
[09:43:13][D][ApplianceBase:173]: Enqueuing the request...
[09:43:14][D][ApplianceBase:139]: Response timeout...
[09:43:14][D][ApplianceBase:146]: Sending request again. Attempts left: 1...
[09:43:14][D][ApplianceBase:162]: TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 1C 09 B6
[09:43:16][D][ApplianceBase:139]: Response timeout...
[09:43:16][D][ApplianceBase:154]: Destroying the request...
[09:43:16][D][ApplianceBase:075]: Getting and sending a request from the queue...
[09:43:16][D][ApplianceBase:162]: TX: AA 1F AC B3 00 00 00 00 00 0D 01 01 02 67 32 A8 C0 FF 00 00 00 00 00 00 00 00 00 00 00 00 C9 A8
[09:43:16][D][ApplianceBase:154]: Destroying the request...
[09:43:17][D][ApplianceBase:075]: Getting and sending a request from the queue...
[09:43:17][D][ApplianceBase:162]: TX: AA 22 AC 8E 00 00 00 00 00 03 41 21 01 44 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 1D 77 62
[09:43:19][D][ApplianceBase:139]: Response timeout...
[09:43:19][D][ApplianceBase:146]: Sending request again. Attempts left: 2...
[09:43:19][D][ApplianceBase:162]: TX: AA 22 AC 8E 00 00 00 00 00 03 41 21 01 44 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 1D 77 62
[09:43:21][D][ApplianceBase:139]: Response timeout...
[09:43:21][D][ApplianceBase:146]: Sending request again. Attempts left: 1...
[09:43:21][D][ApplianceBase:162]: TX: AA 22 AC 8E 00 00 00 00 00 03 41 21 01 44 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 1D 77 62 ```
I added a level shifter, since the AC use 4V+ and the ESP8266 3.3V. The AC still not recognize the ESP. Can somebody help me, please?
I have a Bosch Climate 2000, which looks very similar to your unit, and I’m also unable to configure it. I added a level shifter as well, but got the same result as shown in your logs.
Did you happen to fix it? Thanks!
