# autohuttli nodes

## AtomS3 Lite

<https://shop.m5stack.com/products/atoms3-lite-esp32s3-dev-kit>

<https://docs.m5stack.com/en/core/AtomS3%20Lite>

[Schematic](https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/products/core/AtomS3%20Lite/Sch_M5_AtomS3_v1.0.pdf)

ESP32-S3FN8

I/O:

- Button on G41
- IR LED on G4
- WS2812 LED on G35
- Port A on G1 and G2

## ADC I2C Unit v1.1 (ADS1110)

[Schematic](https://docs.m5stack.com/en/unit/Unit-ADC_V1.1)

[Datasheet](https://www.ti.com/lit/ds/symlink/ads1110.pdf)

Reference is 2.048V with a PGA of 1 to 8. Has a 510 k / 100 k voltage divider
giving a 6.1 divisor or a FSD of 12.5 V.

Changed to a 75 / 39 k divider giving 2.92 divisor or FSD of 5.99 V.

# BTHome ESPNow bridge

Boards:

- https://github.com/01Space/ESP32-C3-0.42LCD

# XIAO ESP32C3

https://wiki.seeedstudio.com/XIAO_ESP32C3_Getting_Started/

https://files.seeedstudio.com/wiki/XIAO_WiFi/Resources/Seeeduino-XIAO-ESP32C3-SCH.pdf

# Growatt ShineWIFI-X

A ESP-07. The vendor firmware sends `00 03 00 2b 00 01 f5 d3` periodically at 115200N81, which is a MODBUS query.

There are many existing implementations:

- https://github.com/pvprodk/GrowattESPHome