Arduino Programming

Scope of Work A.) 1.) Fix corrupt Arduinos. [login to view URL]() prints out garbage and when printing/using Ciao, Serial will not output anything. 2.) One Arduino is permanently in ESR B\L mode. Serial doesn't output anything and wifi not working anymore. 3.) Arduino IDE does no longer show UnoWifi Firmware option 4.) Configure all 2 units properly to be able to MQTT to HiveMQ properly B.) 1.) Write sketches and deploy on 2 devices via TeamViewer a.) Unit A must send TWO STRINGS TO HIVEMQ : ONE STRING to ONE topic and SECOND STRING TO SECOND topic : example : string1 = "A1:3800"; string2 = "A2:14000"; bVp6-ajrz-5blq/data1 bVp6-ajrz-5blq/data2 b.) Unit B must retrieve THAT string from ONE topic and [login to view URL](thatstring) c.) BOTH units must somehow also send a status value to a topic. This will be used to see if the units are "connected/online". This will be vital for a website that will subscribe to these values and display them. I will write this website code myself. The idea is that one unit must send a value, the other one must receive it and somehow I must be able to see that both units are online by subscribing to their status channel or something. I have 96 hours of experience with Arduino, which was not a good experience. I have tried hundreds of sketches and read hundreds of online material but I just don't get it to work.