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I ran into this problem trying to set up the devices completely from the serial console.

Frank Tkalcevic 2018-10-13 12:24:35 +11:00
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Sonoff-Pow-and-Pow-R2.md

@ -28,6 +28,8 @@ As always, you need to access the serial interface.
- **Pow R2**: The **four serial pins** (VDD, E-RX, E-TX, GND) are available at the rear/short end of the PCB. Do not use I04 and I05.
- **Pow**: The **four serial pins** (3V3, Rx, Tx, GND) are available at the rear/short end of the PCB as can be seen in the upper part of the image to the right.
Note - After the module type is changed to "Sonoff Pow" or "Sonoff Pow R2" using the "module" command, the serial port is no longer available for entering configuration commands because the serial port is used to communicate to the power measurement chip. Make sure you have set up your network connection before doing this.
## Calibration
Sonoff Pow might need calibration as correct measurements are influenced by hardware and timing differences.