micPower® goes ESP32.
Micro Power, the Company, has largely retired. But after more than 30 years experience in Power Monitoring, it is hard to complety stop developing.
The latest development is based on ESP32 Espressif 'C' or 'Cpp' with Arduino, FreeRTOS and LWIP.
ESP32 Main Board schematics: ESP32Main
ESP32 Display Board schematics: ESP32 Display
ESP32 18 Bit ADC Board schematics: ADC18
3-Phase Shunt Measurement Interface schematics: not available
3-Phase Hall-Sensor Measurement Interface schematics: not available
Photo of the first hardware.
1.54" TFT, 5 Keys, 3 x LED, Buzzer for keyclicks or alarms, SD Card, RTC, Isolated EV-charger interface, 2 relays, 110/220 AC power supply isolated, isolated RS485 MODBUS etc. isolated KWH pulse, 2 digital inputs isolated.
Isolated 3-Phase Power, RMS Voltage and RMS Current measurement. High precision fast 18-bit ADC convertion. Bandwidth DC-25.000 Hz.
VSPI is shared among: TFT display, Measurement Interface, External RTC with battery, SD Card and EV car interface.
HSPI is used for JTAG interface.
RP2040 Raspberry PI Pico CPU is used for Power Measurement interface (SPI slave)
to ESP32.
1 x 8 bit I2C Port Expander, 1 x 16 bit I2C Port Expander.
Remote UDP WiFi Client Windows App starting to take form. Much more to come ......
The Micro Power Analog Front End's has now been integrated with ESP8266.
♦ Three-Phase electrically-isolated Analog Front End for Shunt Measurement.
♦ SPI Interface. High Measurement Bandwidth DC - 25 kHz. Sample rate up to 600kHz.
♦ Measures Power, RMS Current and RMS Voltage before or after a Variable Frequency Inverter.
♦ 3 x 40 Amp. Very high accuracy (with 18 bit ADC).
♦ 18bit Analog to Digital Converter (optional 16bit or 12bit ADC for cost reduction).
♦ The Shunt-Current runs in the 2 middle PCB layers. Middle layers uses heavy copper thickness.
♦ One ESP32 Core is only running ADC-Converter code on HSPI interface.
♦ Three-Phase electrically-isolated Analog Front End for Hall-Sensor Measurement.
♦ SPI Interface. High Measurement Bandwidth 0 - 25 kHz.
♦ Measures before or after a Variable Frequency Inverter.
♦ Up to 3 x 1000 Amp. Very high accuracy (with 18 bit ADC).
♦ 18bit Analog to Digital Converter (optional 16bit or 12bit ADC for cost reduction).
Applications:
♦ Power Quality Analyzers.
♦ EV Charger.
♦ Energy Measurement.
♦ AC Motor applications. Tool Monitoring. Pump monitoring.
♦ NFT Time Syncronization (WiFi).
♦ WEB server integration (WiFi).
♦ UDP server integration and remote cotrol (WiFi).
♦ MQTT Server Integration coming.
♦ and many others......
