Hi,
i couldn't resist and bought this powermeter on ebay:
https://www.ebay.de/itm/334958415802However, there's almost no documentation on the internet available. Does anyone know how to read measurement values from the serial port? Or even better, have a manual?
It doesn't have much inside - 4 sensors, two MUX's, one SPI ADC and the microcontroller. The microcontroller seems to have the ISP fuse blown, at least i wasn't able to read the firmware the via SPI. Don't have a 44 pin adapter to try parallel programming.
The 4 converters are providing a DC voltage equivalent to the measured power, 0V for -30dBm, +2.5 for about 15dBm. All 4 inputs are generating the same voltages, so all channels seem to be ok. It would likely be not to hard to write a custom firmware for this unit, but maybe someone knows how to use them.
Thanks!