blackboard-STC15
A firmware for STC15L2K32S microcontroller on Black Board T5 ESP-13
Use SDCC to compile
Use STC MCU ISP flash tool to programm
Install both sdcc and stcgal per instructions (or use distribution packages for sdcc)
make make install # will download to the MCU
What it supports for now:
- STC15 UART (baudrate: 115200)
- Reading on-board DHT11 values
- One-wire communications (DS18B20 temp sensor) via P1.5 (pin 4 of 5-pin header)
- I2C communications via pins 2 and 3 (SDA/SCL) of 5-pin header (tested with BH1750 light sensor)
- Using PWM to flash on-board RGB LEDs
- On-board beeper
- On-board relay
- Interaction with frankenstein's nextcloud sensorlogger.
Nextcloud sensorlogger HOWTO
This firmware allows you to post data to your nextcloud sensorlogger
To use nextcloud sensorlogger firmware, you have to:
- Flash your esp8266 with recent frankenstein firware that supports new 'senslog' commands.
- Flash the STC MCU with nextcloud-sensor-logger.ihx
- Before connecting STC & ESP8266 via jumpers, connect uart to esp8266 and configure the relevant environment variables. This can be done by running the following commands in the frankentein commandline:
setenv slog-deviceId YourDeviceId
setenv slog-deviceName 'BlackBoard T5'
setenv slog-deviceGroup 'sensors'
setenv slog-deviceParentGroup 'home'
setenv slog-nextCloudUrl 'https://cloud.example.com'
setenv slog-userName 'Mr. Bean'
setenv slog-password 'aintgonnatell'
saveenv
- Connect the jumpers, and put your board somewhere ;)
STC will power esp8266 on every 15 minutes by default, post the data and turn it off to minimize power consumption. You may want to adjust the timeout in nextcloud-sensor-logger.c.
TODO
- 2nd UART to interface ESP chip