[werk_ag]

I said that because an ESP is not just an wifi to serial device. It's an SoC with upto 8M flash wich can do much more than that. There are a few flavours of programming languages flashable. Arduino ide version is one of them and even basic is possible. Standard they're coming with the AT command set, but that can be changed.

Yes, it's true, there are many examples of its use in several ways.
In our case the ESP8266 was added to the WeatherDuino Pro2 Plus just to allow the RX unit to work as a standalone system for those that just want to upload their weather data to Wunderground, avoiding the use of a PC or RPi.

A more interesting device is the ESP32 wich has bluetooth and dual core. It's the successor of the esp8266.

This is a very promising device. I have been watching it for some time
3 UARTS
3 SPI
2 I2C
12 ADC
among other interesting things... lets see what libraries will come for it.

About OTA,

Don't know if you can read spanisch. Here's a link about updating arduino using the old ESP-01

https://www.sistemasorp.es/2014/11/11/pr...o-esp8266/

Regards, Zappie

I'm Portuguese, so I can read Castellano with some easiness.
Very interesting article... Somewhat complex, but doesn't imply a modified bootloader.
I'm not sure if it couldn't be applied to a weather station... if the upload process fails, it implies accessing the system locally, and it also imply closing the connection (during programing and rebooting) with the weather software running on the PC, which may also cause some problems. But could be very interesting for the TX units, per example...
Thanks for that info.

Regards