RFPM2 – calibration files

The RF Power Meter 2 (RFPM2) stores calibration constants in a file located in the (SPIFFS) file system in the microcontroller flash. The file opened by default when RFPM2 starts is /default.cfg, the following is an example. { “name”:”dBm”, “hostname”:”rfpm201″, “vref”:3.3, “avg”:3, “slope”:0.12991, “intercept”:-91.406, “unit”:”dBm”, “lcdfsd”:16 } The parameters above capture the most basic operation … Continue reading RFPM2 – calibration files

Chinese AD8307 power measurement module #3

At Chinese AD8307 power measurement module #2 I concluded that the modified AD8307 was useful on HF, and through to 54MHz depending on accuracy requirements. This article looks at combining the AD8307 module with a display option based on an Arduino Nano. Above is a demonstration of the display prototype. The module in the foreground … Continue reading Chinese AD8307 power measurement module #3