Have an idea of how many bytes from the sensor and how often you need to send? The wifi uart docs dont say how big a payload you can send in a udp packet for example. It would be about 1400 bytes on ethenet. Thats the Max Transmission Unit MTU. I’ve read msgs on the esp8266 forums that the esp program loops every 20ms. Maybe someone can post a link to this spec? If you had a micro with two hardware uarts that could run at 230400 or 460800 bps, you could read in 460 bytes from the wifi chip in a ms, every 20ms, about 23K bytes per sec. The computer I’m using is sold by an indie guy on tindie called leonerd. Board has a mega328pb with 2 hw uarts, 20MHz resonator. If you dont use the AT commands I guess what everyone else does is compile a c program that looks like an arduino sketch, but they have the arduino ide configured to run the 8266 compiler instead of the avr compiler. How they do this is beyond my understanding. The guy that figured this out is as far above me as I am to the ant. I’d still like a nice uptodate doc file on the at commands. I’ll let someone else explain how to run the 8266 compiler.