Add renogy bp

README.md

@@ -119,6 +119,25 @@ influx replication list \
   --token "$TOWERD_INFLUX_TOKEN"
 ```
 
+## Renogy controller
+
+Need rs232 adapter to talk modbus to renogy controller
+
+```shell
+# list adapters: ls -l /dev/serial/by-id/
+TOWERD_RENOGY_SERIAL=/dev/serial/by-id/usb-Silicon_Labs_CP2102N_USB_Bridge_...
+```
+
+```shell
+# optional
+TOWERD_RENOGY_SLAVE=255
+TOWERD_RENOGY_BAUD=9600
+TOWERD_RENOGY_INTERVAL_S=10
+TOWERD_RENOGY_TIMEOUT_MS=1000
+```
+
+Thank you to [ESP32ArduinoRenogy](https://github.com/wrybread/ESP32ArduinoRenogy) for doing all the hard work!
+
 ## systemd
 
 `towerd` loads `/etc/towerd/env` via `EnvironmentFile`. If using Docker for InfluxDB, ensure Docker starts before towerd: