ESPGeiger

I have a few of these little counters on hand and decided to mod a few. One I have at my office sat on my desk, and another two I'll be sending out in the wild. My original intention was to mod a bunch of them and sell them to potential radmon.org users as a 'works right out of the box' counter submitting to radmon.org. I changed my mind after realizing they take a lot longer to actually mod than I initially thought (because I'm doing a much better job on these than the first), and that recently a version of ESPGeiger firmware was released with a bug that made them unable to update

Modifying my GK Radmon kit Geiger counter to run ESPGeiger firmware has gained a little interest in it. John (BroHogan) the creator of the GK Radmon and other kit counters caught wind of this and appears very happy for me to be slicing and dicing his work - all in the good spirit of things, and Steadramon, the writer of the ESPGeiger firmware is looking if he can make a drop-in version of his ESPGeiger firmware that can be loaded onto the GK Radmon (and probably GK Radmon Plus too) without the need to modify the counter itself. That would be very cool. It has also spurred on an ESPGeiger

Please note that this mod is no longer necessary as the pins can be selected within the ESPGeiger firmware settings. A couple of days ago Steadramon released an updated version of his ESPGeiger firmware, which included a new webhook feature I had been patiently waiting for. This got me playing about with ESPGeiger again and the thought crossed my mind "can I get it to run on my GK Radmon?" I bought my GK Radmon kit about five years back. I didn't like the original firmware much. Not that it was bad, it just didn't suit the way I use my counters. The original firmware was written for very low

I couldn't wait to tinker with this so I decided to mod this in lieu of getting the ESP-12 modules and programmer. Using a scope I found the connection points I needed, Soldered some wires on. Soldered a Wemos D1 Mini clone on the other end, installed ESPGeiger 0.7.0, and boom! Literally as simple as that. Using the scope I checked the ribbon cable pins one by one and found the pulse coming from the PSU board. I didn't want to solder right on the ribbon, it looks janky already, so probed about and found that it is connected to L12. The MCU side of the inductor is where I soldered the pulse