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The signal goes in both positive and negative direction with respect to the GND
There are more than 150+ different Groves currently if you are not familiar with Grove
smart electricity
Rated current (mA) : < 1200
USR-W610 User Manual
D22 NB-IoT LTE CAT-M Waterproof Outdoor Temperature Sensor (2 probes) Current The signal goes in bothD22 NB IoT LTE CAT M Waterproof Outdoor Temperature Sensor (2 probes) The Dragino D22 NB or D22 CB is a NB IoT LTE CAT M Temperature Sensor for Internet of Things solution. D22 NB or D22 CB will convert the Temperature reading to upload the sensor data sent to IoT platform via NB IoT LTE CAT M network. The temperature sensor used in D22 can measure 55C ~ 125C with accuracy 0. 5C (max 2. 0 C). D22 supports a temperature alarm feature, user can set a
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