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Adafruit PowerBoost 500 Shield - Rechargeable 5V Power Shield : ID 2078 : $19.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Arduino on Twitter: "Monitor your electricity consumption through the Arduino IoT Cloud using a MKR WiFi 1010, a MKR 485 Shield, and a Modbus-compatible energy meter: https://t.co/xzBjeF3ShE https://t.co/0QS9MuvNQF" / Twitter
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