Photon RSSI - what does it really mean?

[ScruffR]

You mean like the signal strength bars on a mobile?

Electron Signal Strength LED Algorithm

The easiest would be to map the range via tha map() function. Give this a shot int strength = map(RSSI, -131, -51, 0, 5); You may have to tweak the boundaries (-131/-51) a bit to get the mid point of each category right. And this is the code from the firmware repo void system_display_rssi() { /* signal strength (u-Blox Sara U2 and G3 modules) * 0: < -105 dBm * 1: < -93 dBm * 2: < -81 dBm * 3: < -69 dBm * 4: < - 57 dBm * 5: >= -57 dBm */…