The purpose of this project is to combine the cheap WiFi capable ESP8266 with the STC-1000 (specifically running the STC-1000+ communication firmware). The ESP8266 replaces the Arduino in this setup and opens up for a lot of new possibilities.
This project is still in its infancy and is not yet ready for public use.
The ESP8266 needs to run a custom firmware. This is implemented using the awesome Sming framework. To be able to build (and modify) this project, a working Sming development environment needs to be setup first.
- STC-1000 (A400_P hardware version)
- ESP8266 module (ESP-12E recommended, ESP-12 and ESP-07 will work)
- 3 zener diodes 3.3v
- 3 resistors 330 ohm
- 20k resistor
- (a schottky diode)
- an USB serial adapter that can do 3.3v and preferrably has RTS and DTR signals broken out
- a 3.3v power source that can provide 300mA minimum
A list of the connections:
| STC-1000 | ESP8266 |
|---|---|
| nMCLR | GPIO14 |
| VDD | VCC |
| GND | GND |
| ICSPDAT | GPIO12 |
| ICSPCLK/COM | GPIO13 |
| Serial | ESP8266 |
|---|---|
| VCC | 3.3V |
| DTR | GPIO0 |
| RXD | TXD |
| TXD | RXD |
| RTS | CH_PD |
| GND | GND |
Note that the ESP is not 5v tolerant, so levelshifting (using zeners) is required. Heres the schematic of my setup, sorry for the crappy image.
