Add submission # 3550

#3550

Author: ArduinoBot

registry.txt

@@ -6464,3 +6464,4 @@ https://github.com/kotwatthana/WebServerFileUpload.git|Contributed|WebServerFile
 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