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Christoffer Martinsson 2023-08-30 22:17:55 +00:00
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# Han Mqtt Adapter # Han Mqtt Adapter
### Protocol
[link to HAN protocol](https://hanporten.se/svenska/protokollet/)
### Hardware
Han port pinout (RJ12): Han port pinout (RJ12):
1. 5V (max 250mA) 1. 5V (max 250mA)
2. Data request (connect to 5V to enable) 2. Data request (connect to 5V to enable)
@ -7,7 +12,11 @@ Han port pinout (RJ12):
5. Data (TX 115200 inverted open drain) 5. Data (TX 115200 inverted open drain)
6. GND 6. GND
Add pullup resistor between Pico RX pin and 3V3 PicoW connection:
- Connect HAN port pin 1 and 2 to pico 5V
- Connect HAN port pin 3 and 6 to pico GND
- Connect HAN port pin 5 to pico 1 (RX)
- Add pullup resistor (15k) between Pico RX pin and 3V3
![front](20220814_231222.MEDIUM.jpeg) ![front](20220814_231222.MEDIUM.jpeg)
![back](20220814_231229.MEDIUM.jpeg) ![back](20220814_231229.MEDIUM.jpeg)