Enquiry about compatibility

Hi, I am working on a real time monitoring system. I am planning to obtain real time data through Thingspeak from installed sensor and a notification alert if any reading exceed threshold value. Hence, i would like to know how can I connect and program a ESP8266 wifi module and a GSM module SIM800l.

to better finish the sentence. both wifi and GSM module are to be connected to Arduino Uno

Your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advice on) your project.

Welcome to the forum!
Your question is too general. Read the beginner's guides, see examples and be more specific.

I will add that connecting the esp8266 to the Uno is rather strange, the esp8266 board itself contains a processor programmed in the arduino environment, much more powerful than the obsolete atmega328 on Uno board

the esp8266 that i am talking about here is ESP8266-01s. a very simple wifi module.

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