Serial communication slight problem using Wemos D1 R2 and UNO + ThingSpeak

AndiAkF:
Hello, i am new to arduino and currently seeking guidance on how to proceed.
my project uses 3 ACS712 sensor connected to UNO to detect current flowing through and then send the data to ThingSpeak using Wemos D1 R2 as the internet.

Have you seen this link here ? ....

https://forum.arduino.cc/index.php?topic=143382.0