aceindy
January 18, 2026, 9:44pm
21
Solax works out of the box with esphome on growatt modbus…i can really advise it
Cooked this esphome yaml together to re-flash my Growatt ShineWiFi-X dongle.
I’m using it with the Solax integration on a Growatt MOD 4000TL3-XH, but it should work on any model.
I re-used the led’s to:
Green → TX
Red–> RX
Blue–>Status ;If no clients, just a 1Hz heartbeat, otherwise a 100ms pulse for every client (with a 3s interval).
[image]
[image]
For flashing the firmware it is required to jump GPIO0 with gnd during power up.
You can either flash by USB of TTL
[image]
PS: I advi…
Unfortunately it looks like the TL3-S (which we have) differs from the TL3-X quite a lot in this area as it does not have a USB port for the dongle, it just has a RS232 port for the wifi stick.