Toshiba HVAC ESP8266 control based on Tasmota firmware with external API (PHP/Python).
For Toshiba Shorai-Edge compatible units.

Home Assistant integration based on AppDaemon Python/MQTT control script.

I will add instructions, but if someone interested can help me, I will appreciate it. ;-)

(Final installation of ESP in the unit)

(Example of Home Assistnant's Lovelace component)

Tasmota Firmware
Home Assistant
AppDaemon for Home Assistant

BLUE = to ESP TX
PINK = GND
BLACK = +5V VCC
WHITE = to ESP RX

Flash Tasmota to ESP, set password and WiFi network parameters.

In console input these commands:

SerialConfig 8E1

Baudrate 9600

Rule1 ON Time#Minute DO SerialSend5 020003100000060130010001BBF9 ENDON

Rule1 1

Rule2 ON SerialReceived#Data$<0200039000000901300100000002 DO Var2 %value% ENDON ON SerialReceived#Data$<0200039000000801300100000001 DO Var3 %value% ENDON

Rule2 1

Rule3 ON Wifi#Connected DO Backlog SerialConfig 8O1; SerialConfig 8E1; Delay 10; SerialSend5 02FFFF0000000002; SerialSend5 02FFFF0100000102FE; SerialSend5 020000000000020202FA; SerialSend5 0200018101000200007B; SerialSend5 020001020000020000FB; SerialSend5 02000200000000FE; Delay 20; SerialSend5 020002010000020000FB; SerialSend5 020002020000020000FA ENDON

Rule3 1

(It is the serial configuration, keep-alive timer, HVAC response extraction and WiFi reconnection handshake.)

Nothing else need to be set.