JeonLab

Hi Johan,That's quite interesting project. My concern is how fast the GPS data need to be updated. Recently I have posted another GPS related project (https://jeonlab.wordpress.com/2018/03/10/golf-gps/) using PA6C GPS module. Its datasheet says its update rate is 10Hz, but due to other calculations on the microcontroller, actual update is much slower than that. I guess your project needs pretty fast update to measure the time difference between two positions. How far is the distance between those two gates and what resolution of time measurement do you need?

Did you mean the PCB? You can buy one from me.

Great Instructable! Thank you for sharing this. I was looking for a simple solution to upload sketches to ESP-01 without those two annoying switches for RST and GPIO0 which is not always successful. With your solution, I could always successfully upload sketches. Thanks again.

Those spray paint you can buy from a hardware store are normally non-conductive, so it won't affect on the antenna. But somehow, if the spray paint you want to use is conductive, just be careful not to spray on the connector.