Archive for the ‘Sensors’ Category.

Multisensor LoRa Device

The described device is nearly matchbox-sized board (50 x 24 mm) packed with sensors. Auxilary board is 10x50mm with additional sensors. The module is developed around the Murata ABZ LoRa module, which integrates STM32L072 and samtech SX1276 in tiny 12.5 x 11.6 x 1.76 mm package. The main board is equipped with following sensors:

  • Magnetic compass MAG3110
  • Thermometer TMP75 for internal temperature measurements
  • MPU unit is MPU6050
  • RH and temperature sensor Si7013

Small section of the main board can be separated. There aqre 6 sensor on this part of the PCB:

  • Thermometer TMP75
  • RH sensor SHT31
  • RH, T and pressure sensor BME280
  • Another Si7013 for external RH and T measurement
  • Ambient light sensor VEML6030
  • UV sensor VEML6075

There are two 1Mbit EEPROMs on-board for local data logging. Additional pins are available for SPI, 2x UART and I2C interface, where even more sensors can be attached.

LoRa multisensor module

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Affordable pH meter

Our home vineyard delivers about 1000 liters of wine every year. It takes some effort to keep good quality and pleasure for all friends tasting the must, new wine and “senior” wine reserves. One of the most important tasks in wine quality management is controlling the biological and chemical state of the wine. The wine can be monitored in special laboratory or in home lab. Of course home lab become rational when quantity of the wine is high enough to justify expenses in special equipment.  There is some low cost equipment available for wine analysis, mostly with titration techniques, but chemical lab equipment is rather expensive and many hobby wineries avoid buying such equipment. I hope this post can contribute a bit to change that. I will describe the development of simple pH meter in detail.

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