diff --git a/Sonoff-Pow.md b/Sonoff-Pow.md index b6553ce2..2633335f 100644 --- a/Sonoff-Pow.md +++ b/Sonoff-Pow.md @@ -1,16 +1,15 @@ -### Sonoff Pow - +* Itead Product Page: http://sonoff.itead.cc/en/products/sonoff/sonoff-pow +* Itead Shop: https://www.itead.cc/sonoff-pow.html +* Itead Wiki: https://www.itead.cc/wiki/Sonoff_Pow -Trying to program the Sonoff Pow [comrade MySKU](http://mysku.ru/blog/china-stores/45762.html) learned the hard way how to brick it. +## Serial Connection -Sonoff Pow Bricked -As the Sonoff Pow power monitoring hardware connects AC power to the logic ground of the ESP8266 it is utterly mandatory to **NOT CONNECT AC POWER WHILE SERIAL CONNECTION IS BEING USED**. +picture of the Sonoff Pow PCB, the needed pin header can be seen on the top end -During both AC connection and Serial connection you may connect the life AC wire with your PC's DC ground leading to a power short, broken Sonoff Pow and laptop Power Supply as MySKU has experienced. +Please see the [Hardware Preparation](https://github.com/arendst/Sonoff-Tasmota/wiki/Hardware-Preparation) page for general instructions. -A solution that works for me is shown in the schematic below using two opto couplers seperating the AC connection on the **left** from the low voltage connection on the **right**. This allows for serial control at 115200 baud and uploading of firmware up to 57600 baud while AC is connected. -OptoSerial +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. ## Calibration Sonoff Pow might need calibration as correct measurements are influenced by hardware and timing differences. @@ -18,8 +17,8 @@ Sonoff Pow might need calibration as correct measurements are influenced by hard I used the following procedure to calibrate. 1. Prerequisites - - Calibrated multimeter ;-) - - Optional calibrated power meter ;-) + - Calibrated multimeter :wink: + - Optional calibrated power meter :wink: - 60W light bulb 2. Connect the Pow to the optional power meter. 3. Connect the 60W light bulb