BlitzWolf BW SHP2
To open the case you will need a triangular bit (2,3mm).
PCB revision is 3.3
The design is based on the ESP8266-S3 module with 1MB flash (Datasheet).
Pinout of the ESP8266-S3:
| left | right | ||
|---|---|---|---|
| TOUT | EN | ||
| IO12 | SEL Pin HJL-01 | IO14 | CF1 Pin HJL-01 |
| IO15 | relay (high act.) | IO13 | button (low act.) |
| IO2 | blue LED (low act.) | IO0 | red LED (low act.) |
| IO5 | CF Pin HJL-01 | IO4 | |
| TXD | RXD | ||
| GND | 3v3 |
Power meter chip is marked with HJL-01, 1749CYH, D797480E. It seems to be functional equivalent to HLW8012 or BL0937 (minus different resistor values leading to different ratios. See https://github.com/xoseperez/espurna/commit/cb63e2659bf80ef943dee1ac4019e52f029056f7
I'm using 5V to the input pin of the AMS1117 3v3 LDO. You can also connect 5V to the pin of the relay (marked on the bottom side picture of PCB).
Feeding 3v3 directly to Pin 3v3 will also work fine.
