Picture of Catena 4802

Catena 4802 combines Qwicc, Temperature, Humidity with Modbus

Our new MCCI Catena 4802 builds on our popular MCCI Catena 4801 — a minimal RS-485/Modbus/Mbus device with LoRaWAN support — adding two important features.

  • A Sensirion SHT31-DIS-F temperature/humidity sensor, with PTFE membrane protection.
  • A Sparkfun Qwicc connector, allowing access to a large variety of sensors, LCDs, relays and more, via I2C.

Unlike the 4801, the 4802 is designed to run with an external supply greater than 3.3V; it includes an efficient LDO regulator. If used in the MCCI Model 4060 enclosure, it can be powered by a 19 Ah 3.6V Lithium Thionyl Chloride battery. If used in the MCCI Model 4050 enclosure, it can be powered from 5V for line-powered operation.

Like the 4801, the 4802 includes an RS-485 driver. On the 4802, we’ve further reduced the standby power by controlling the TX and RX enables of the RS-485 driver independently. It takes another GPIO, but it allows for deep power down when RS-485 is not being used.

Like the 4801, the 4802 includes a high-side switch with two channels. One channel controls power to the on-board peripherals; the other channel controls power to the RS-485 driver, the Qwicc connector, and the screw terminals.

The Qwicc bus is further decoupled from the internal I2C bus by a PCA9306 I2C bidirectional translator / isolator. By leaving the PCA9306 disabled except when talking to Qwicc devices, software can ensure that external faults will not affect internal I2C peripherals.

The CPU is an STM32L082, with 192K bytes of flash and 20K bytes of RAM. It in a Murata Type ABZ module, which integrates the CPU with a Semtech SX1276 and RF components. The antenna attaches via a U.FL connector.

MCCI software for the Murata module supports operation on either LoRaWAN or Sigfox networks. MCCI software is tested with a wide variety of networks, including Actility, The Things Network, The Things Industries, Helium, myDevices, machineQ, Senet, ChirpStack, Senra, Tata, and Swisscom; MCCI will support operation with any LoRaWAN 1.0.2 or 1.0.3 network.

Although the 4802 does not have the same interconnect scheme as the Adafruit Feather system, it uses the same mechanical form factor. This allows it to be used with any Feather-compatible case, including the MCCI Model 4050, the MCCI Model 4060, MCCI’s Feather-system cradle, or cases from other vendors.

Volume discounts and custom variants are available. Contact MCCI via email (sales@mcci.com) for assistance.

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