After installing the ESPhome firmware to my SH-P01s I quickly noticed I had to update the firmware settings. It turned out that updating the firmware is easy after the device is running on ESPhome.

First I had to find out the IP of the device. I used nmap for this. First I connected my laptop to the same network with the relays and then:

$ nmap -sL 192.168.4.0-255

Starting Nmap 7.60 ( https://nmap.org ) at 2020-02-24 22:11 EET
Nmap scan report for 192.168.4.0
Nmap scan report for 192.168.4.1
….
Nmap scan report for 192.168.4.30
Nmap scan report for relay_1.your.localdomain (192.168.4.31)
Nmap scan report for 192.168.4.32
…
Nmap scan report for 192.168.4.58
Nmap scan report for relay_2.your.localdomain (192.168.4.59)
Nmap scan report for 192.168.4.60
…
Nmap scan report for 192.168.4.255
Nmap done: 256 IP addresses (0 hosts up) scanned in 0.32 seconds

It was easy to find the relay 1 and its IP 192.168.4.31 from the nmap output. Now I could edit the firmware configuration and re-compile the firmware. I used the dockerised version of ESPhome:

docker run --rm -v "${PWD}":/config -it esphome/esphome relay_1.yaml upload --upload-port 192.168.4.31

INFO Reading configuration relay_1.yaml…
INFO Connecting to 192.168.4.31
INFO Uploading relay_1/.pioenvs/relay_1/firmware.bin (428624 bytes)
Uploading: [============================================================] 100% Done…

INFO Waiting for result…
INFO OTA successful
INFO Successfully uploaded program.

Done!