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Add serial pin info and AC pin info

Theo Arends 2018-04-20 17:10:58 +02:00
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commit 688a917746
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10
Sonoff-Pow-and-Pow-R2.md

@ -14,15 +14,19 @@ It can at least destroy your Pow!
**The GPIOs on the Pow might be connected to AC power**, therefore it is not possible to add sensors to the Pow.
**The AC connection between Pow and Pow R2 is different so be careful when you perform an in-place replacement**
**The AC connection between Pow and Pow R2 is different**, so be careful when you perform an in-place replacement.
- Pow R2 AC connection: Lo-E-E-Li-N-N = LineOut-EarthOut-EarthIn-LineIn-NeutralOut-NeutralIn
- Pow AC connecrion: Lo-E-E-N-N-Lin = LineOut-EarthOut-EarthIn-NeutralOut-NeutralIn-LineIn
## Serial Connection
<img alt="picture of the Sonoff Pow PCB, the needed pin header can be seen on the top end" src="https://www.itead.cc/wiki/images/e/e3/Sonoff-Pow-00.JPG" width="40%" align="right" />
<img alt="picture of the Sonoff Pow PCB, the needed pin header can be seen on the top end" src="https://www.itead.cc/wiki/images/e/e3/Sonoff-Pow-00.JPG" width="50%" align="right" />
Please see the [Hardware Preparation](https://github.com/arendst/Sonoff-Tasmota/wiki/Hardware-Preparation) page for general instructions.
As always, you need to access the serial interface. 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.
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 as can be seen in the upper part of the image to the right. 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.
## Calibration
Sonoff Pow might need calibration as correct measurements are influenced by hardware and timing differences.