Skip to main content

CHESTER-U1 Module

CHESTER-U1 is a cost-optimized CHESTER-M mainboard compressed to the small 38x38mm module.

Instead of using CHESTER-M and putting extension modules in it, you design a two-layer carrier board and put CHESTER-U1 in it.

CHESTER-U1 has these properties:

  • Electrically identical to CHESTER-M (the same firmware binary can run without any changes)
  • Cost-optimized
  • Carrier board can be just a two-layer board
  • Contains the same Application MCU (APP/BLE nRF52840) and LTE (nRF9160)
  • Could be designed into smaller enclosures
  • Can be connected to CHESTER-X extension modules the same way as CHESTER-M
  • Contains a nano SIM card holder onboard
  • Connect just a battery and u.Fl antenna

CHESTER-U1 layout

E-CAD Library​

HARDWARIO can provide ECAD footprints for your integration.

Layout​

CHESTER-U1 layout

Schematics​

Interface​

In this view, the signals are placed exactly as you look at the module from the top side. Signal placement has been optimized so you can easily route your wires on a two-layer printed circuit board.

Schematic 1/4: CHESTER-U1 interface pinout with signals JP1–JP38 placed as seen from the module top

MCU​

Schematic 2/4: MDBT50Q MCU/BLE, temperature and tilt sensors, NOR flash, 1-Wire master, and LED drivers

LTE​

Schematic 3/4: nRF9160 LTE modem, SIM interfaces, antenna connectors, and GPS load switch

Power​

Schematic 4/4: TPS61023 boost converter, LDO, power LED, load switching, and TLA2021 ADC

CHESTER-C4 Carrier Board​

We have carrier boards that can be used directly in your product with CHESTER-U1 or you can base your own design on them. Get in touch with us, we can provide you with more information.

One of the carrier boards is CHESTER-C4, it contains a slot for two extension modules and can have multiple battery or external power options.

Bottom Side​

CHESTER-C4 bottom

Top Side​

With "D" cell option.

CHESTER-C4 top