Do the smart thing by replacing your conventional meter with the smart meter.

Smart meter using lora for energy companies

We help clients by providing embedded software solutions for various industry sectors including Broadcasting, telecom, logistic transport, oil and gas, remote automation.

Clients requirement

  • To develop a slave devices or smart meter using lora capable of reading the gas and electric value every 10 seconds.
  • Slave device with RTC chip must report energy values with Master device wirelessly.
  • Master device must have a RTC chip for accurate time.
  • Master device must store the energy usage value per day in primary memory.
  • Master device must be capable of short range wireless communication with slave devices for a distance of 400 meters or higher.
  • Master device must be capable of displaying total energy usage per day.
  • Master device must be capable of wifi communication to send energy usage per day to the energy company.
  • Slave device must be capable of turning supply/relay on/off based on master device request.
  • LoRa communication must be used between master and slave.

Challenge

  • To choose micro-controller that supports multi thread operation. while consumes less power during run time.
  • Supports multiple interfaces like i2c, spi, RS232, RS485.
  • Should have enough internal memory for storing energy values.
  • Should interface with wireless interface via SPI bus.
  • Should be capable of wifi communication.
  • Drafting a protocol frame format for communication between master and slave devices.
  • Should be capable of turning GPIO pin ON/OFF.

Our Solution

  • ESP32 with RS232, RS485, SPI, i2C, RTC, wifi interface and with 4MB internal memory which supports FreeRTOS for multithreaded functionality used for slave devices.
  • LoRa chipset SX1276 module with SPI interface for Long range communication between master and slave devices.
  • TI AM335X chipset with 5inch LCD display with SPI interface for LoRA and linux capable serves the purpose of master devices.
  • TI AM335X validates the authenticity of the ESP32 devices. Predefined LoRa frames are exchanged between slave and master.
  • TI AM335X saves the energy usage per day on internal memory.
  • ESP32 GPIO pins are capable to turn on/off relay/switches on electric or gas meters based on TI AM335X request.
  • TI AM335X has wifi & ethernet port to valid the energy usage of gas or electric meter from the energy companies.

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