@vicatcu Thank you for your support. I have recently bought 2 eggs. They were working well. However, I wiish to reprogram it through arduino.
I followed all the steps of your re-programming post. I took the AQEV2FW_PM_CO_NO2_ESP and flashed the code. unfortunately, I was getting a corrupted software message. Luckily, I was able to revert back and update to the latest firmware through the conventional approach of egg serial configuration software. There I saw that the update file name was AQEV2FW_PM_CO_NO2B_ESP. I did not find the corresponding .ino file.
Why I am doing this is, when I bought the eggs, I did not know that there was a data logger. Now I don’t have the money or the time to purchase the data logger. So I added an sd card to the egg and it is logging successfully (but without timestamp). But I saw an RTC on GPS logger, and I want to use the data logger also. Is this possible? If so please help with the reprogramming?