Add submission # 3551

#3551

Author: ArduinoBot

registry.txt

@@ -6465,3 +6465,4 @@ https://github.com/lysek01/ModbusPowerMeter.git|Contributed|ModbusPowerMeter
 https://github.com/m5stack/M5Unit-IMU-Pro-Mini.git|Contributed|M5Unit-IMU-Pro-Mini
 https://github.com/marcin-filipiak/DeviceConfigJSON.git|Contributed|DeviceConfigJSON
 https://github.com/adafruit/Adafruit_ADS7830.git|Recommended|Adafruit ADS7830
+https://github.com/GyverLibs/Pairs.git|Contributed|Pairs