#Specification CMIS-1

CMIS v1 specification overview:

  • Espressif ESP32 WROOM
    • 2.4GHz Wi-Fi and Bluetooth LE MCU module, with dual core CPU
  • AT24C64 EEPROM
    • For storing parameters, calibration data, Logs etc.
  • 4 x Isolated Bi-directional Current Sensors AC/DC Maximum ±100A
    • ACS758 100A (ACS758LCB-100B-PFF-T), Hall Effect based, Linear Current Sensor
    • Large Quality Terminal Blocks suitable for 20 AWG up to 6 AWG, 10mm², Rated 52A 300V
  • ADC 12-bit Resolution
    • Using ESP32 Internal ADCs
  • CT Clamp Input
    • With or without Burden Resistor.
    • Suitable for popular SCT013 YHDC
  • On-board Temperature Sensor
    • NTC (range -40ºC to +125ºC)
    • Micro USB.  Uses the popular CH340 for ease of developing code, flashing and debugging
    • Arduino D1 Flashing and Programming Compatibility
    • No drivers normally needed
  • OLED Display Connections
    • I2C
  • DC Power LED (red)
  • RGB LED (ESP software code / firmware controlled)
  • SPI and I2C Connections
  • DAC Output
    • With LP/HP filter options (unpopulated R/C)
    • Configurable via 0805 place-holders and jumpers
  • On board 3V3 and 5V LDO Voltage Regulators
    • PCB 7-15V DC Input
  • PCB Size 100mm x 95mm

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