[question] compatability

[Tom-Neverwinter]

Is this code compatible with the Geiger counter kits?

For instance can this be used with this setup?
https://www.youtube.com/watch?v=K28Az3-gV7E&feature=youtu.be

[grillbaer]

I also own that (or a similar?) kit. My kit outputs 3.3 V low pulses of about 300 µs length at the VIN pin (using 5 V power supply):

3.3 V output is great, since it might be used directly as input for the ESP32. Please make sure that your kit also outputs not more that 3.3 V or you might blow your GPIO!

My current code counts high pulses on GPIO 18, not low pulses.

However, in WiFi mode (GPIO 4 low), the code simply counts rising edges using interrupts. So it should still work out of the box since each pulse always has a rising and a falling edge.

In low-power mode (GPIO 4 high), it uses light sleep to wait for a pulse input change. This will not work directly with the kit, because it expects a high level after the first wake-up and a low level after the second wake-up. You could change the expected level in main.cpp takeSampleLowPower(). The pulse length of 300 µs should probably be long enough for the light-sleep wake-up, but I'm not absolutely sure.

The factor STS6_CPM_PER_USPH used in main.cpp to convert count-per-minute to the estimated micro-sievert-per-hour must be replaced with a lower value for that much more insensitive tube.

[Tom-Neverwinter]

Thank you for the information :)