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Voltage DC Current Power Measurement Module Battery Power Monitoring Detection Motor Stall 2mΩ
Specifications:
- Item Name:High Precision Voltage DC Current Power Measurement Module
- Power Supply: 5V
- Size: 59 x 28mm
- Command Type: AT Command
- Control Ways: Voltage, current or power threshold control relay
- Output Way: Serial Output (PC reads voltage, DC current, power via USB to TTL.)
Sampling Resistor 2mΩ Version:
- 2mΩ sampling resistance, high-precision large current version
- Detected Voltage Range: 0-36V
- Detected Current Range: DC 0-40A (The measurement error for above 30A is large due to non-linearity)
- Detected Power Range: 0-1080W
- Error: 0.33% @66W
Note: Due to the line loss of the test line, the measured voltage and power are greatly affected. The error is a value selected based on the measured current accuracy.
Attention:
If users want to replace the resistor, please set the resistance of the sampling resistor with AT command, and then set the maximum operating current to work normally.
For example, what you purchased is the 10mΩ version which can detect 6A dc current. Now you want to change the sampling resistor with a 2mΩ resistor. First input command AT+R+2, then input AT+MAXC+40. Now the module is changed to 2mΩ version, which can measure 30A DC current.
In theory, the smaller the sampling resistance, the lower the accuracy of the measured range.
Package Included:
- 1 x Voltage DC Current Power Measurement Module
Note: Please contact us for schematic diagram + AT commands + serial port assistant software after purchasing. Thank you!
Part of AT Commands:
Alarm Polarity:
- AT+POLAR+0: After the alarm condition is reached, the alarm light is on and the NC end of the relay is connected.
- AT+POLAR+1: After the alarm condition is reached, the alarm light is on and the NO end of the relay is connected.
Alarm Mode Settings:
- AT+MODE+OVERC: Over-Current Alarm
- AT+MODE+UNDERC: Under-Current Alarm
- AT+MODE+OVERV: Over-Voltage Alarm
- AT+MODE+UNDERV: Under-Voltage Alarm
- AT+MODE+OVERP: Over-Power Alarm 
