RPEM v1 specification overview and connections
- Core
- ESP-12S MCU
- EEPROM 27C64 (64kbit | 8K x 8bit)
- ADC ADS7828 (12-Bit 8-Channel Sampling)
- On-Board 3V3 (1A) and 5V (100mA) LDO Regulators
- 6-15V DC Input Supply
- Inputs
- 4 x CT Current Clamp (3.5mm Sockets), or Voltage (Pads)
- NB. If you remove the 22R resistor(s), mixed DC Current and Voltage inputs can be configured.
- On-board NTC (Temperature)
- On-Board DC Input Voltage Monitor
- Opto Reader (Meter Pulse Reader / Expansion)
- Examples: TSL257 / 3DU5C / GL5528
- 4 x CT Current Clamp (3.5mm Sockets), or Voltage (Pads)
- Outputs
- FET Driver (Max 100V / 1.5A)
- Status LED
- Power LED (3V3)
- OLED Display Support (I2C Dual Headers)
- Communication
- USB UART (Micro / Flashing / Debugging / Config)
- RS485 (Monitoring / Expansion)
- I2C (Expansion)