The board has following connectors:
- mains connector with sqrew terminals (
Lin,L1,L2,N). Mains supply should be connected toLinand one ofNterminals. The loads are connected toL1/L2and one ofNterminals. - ISP connector for ATTiny flashing. Pins are (from left to right):
RST,MOSI,MISO,SCL) - switches output connector for debug, etc. These are connected to ATTiny outputs controlling triacs. Pins are (from left to right):
L1,L2,3V3,GND.
There are two microcontrollers to run this switch
-
ESP-01 - use one of available firmware options:
- ESPurna firmware: https://github.com/foxel/espurna/tree/lightfox-dual
- Tasmota firmware: https://github.com/foxel/Sonoff-Tasmota/tree/foxel_dual_rf
-
ATTINY441 - firmware is in
attiny-firmwarefolder. This requires ATTinyCore to build
To flash ESP module connect it to PC any available way (e.g. USB-Serail adapter + breadboard) and follow selected firmware option flashing instructions.
To flash ATTINY:
- remove ESP-01 module from the header
- connect ISP programmer (i.e. Arduino flashed with ArduinoISP) to ISP port
- use Arduino to flash MC: board is ATTiny441 (installed from ATTinyCore)
| Item | Qty | Reference(s) | Link |
|---|---|---|---|
| 100uF, 5v | 1 | C1 | |
| 3mm red LED | 2 | D1, D2 | |
| BTA08-600BW | 2 | D3, D4 | |
| 1A fuse | 1 | F1 | |
| Screw Terminal 01x03 | 2 | J1, J3 | |
| 4pin header | 2 | J2, J4 | |
| 470R, 0.125W | 2 | R1, R2 | |
| 150R, 0.125W | 2 | R3, R4 | |
| 390R, 0.5W | 2 | R5, R7 | |
| 470R, 0.5W | 2 | R6, R8 | |
| 10K, 0.125W | 1 | R9 | |
| Itead.cc RF receiver | 1 | RF1 | https://www.itead.cc/rf-receiver-module-433mhz.html |
| ATTINY441-SSU | 1 | U1 | |
| ESP-01S | 1 | U2 | |
| MOC3043M/MOC3063M | 2 | U3, U4 | |
| HLK-PM03 | 1 | U5 |