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SolarLoRaBox

h0lad·SolarLoRaBox·pcb/SolarLoRaBox.kicad_pcb

SolarLoRaBox PCB layout, top view — open source STM32 board by h0lad
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About the SolarLoRaBox PCB

SolarLoRaBox is an open source STM32 PCB design by h0lad, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 71.3 × 92.8 mm, with 52 components from 26 distinct parts.

Its main chip is the STM32U083CCT6, from the STM32 family. Other key parts include the BQ25185, HE9073A30MR, APX803L05-32SA-7, W25Q128JVS and SS26_C5350986. By type, the board carries 19 capacitors, 12 resistors, 9 connectors, 8 ICs, 2 switches and 1 diode.

It belongs with the rf & radio and power & battery designs in this gallery.

From the project

An experimental low power LoRa platform based on the ST STM32U083CCT6 + Heltec RA-62 (Semtech SX1262) + 128MBit Flash and the solar charge controller TI BQ25185

This is an experimental platform for an solar driven LoRa sensor station based on the

- Microcontroller: ST STM32U083CCT6 - Radio: Heltec HT-RA62 (Semtech SX1262) - Charging Controller: TI BQ25185 - Flash: Windbond W25Q128JVS (128 MBit) - Reset IC: APX803L05-32SA-7 (3.2V) - LDO: HEERMICR HE9073A30MR (3.0V)

Plan is to´ use it as platform for a wireless sensor based on Zephyr.

SolarLoRaBox, from the project README
From the project README

Main components on the SolarLoRaBox

BQ25185STM32U083CCT6HE9073A30MRAPX803L05-32SA-7W25Q128JVSSS26_C5350986

SolarLoRaBox bill of materials (BOM)

52 components, 26 distinct parts.

QtyPartRefs
1
BQ25185
U1
1
STM32U083CCT6
U2
1
HE9073A30MR
U3
1
APX803L05-32SA-7
U4
1
W25Q128JVS
U6
1
~
U7
2
SS26_C5350986
U8, U9
2
Conn_01x02_Socket
J1, J2
6
Conn_01x04_Socket
J3, J5, J6, J7, J8, J9
1
Conn_01x05_Socket
J10
1
Battery_Cell
BAT1
1
SSSS811101
SW1
1
SW_Push
SW2
1
LED
D1
3
4.7uF
C1, C4, C13
5
1uF
C2, C6, C9, C11, C16
1
10uF
C3
10
100nF
C5, C7, C8, C10, C12, C14, C15, C17 +2
3
100k
R1, R3, R7
2
10k
R2, R9
Show 6 more
QtyPartRefs
1
300
R4
1
MF11-103
R6
1
R
R8
2
1M
R11, R12
1
910k
R13
1
130k
R14

SolarLoRaBox design files

The KiCad project lives in the h0lad/SolarLoRaBox repository on GitHub; these links point at the commit this page was built from.

SolarLoRaBox: common questions

What microcontroller does the SolarLoRaBox use?

The SolarLoRaBox is built around the STM32U083CCT6, from the STM32 family.

How big is the SolarLoRaBox PCB?

The SolarLoRaBox measures 71.3 × 92.8 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the SolarLoRaBox?

52 components, from 26 distinct parts. The full bill of materials is listed on this page.

Where can I download the SolarLoRaBox design files?

From the h0lad/SolarLoRaBox repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the SolarLoRaBox design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which h0lad chose for the repository.

Can I test firmware for the SolarLoRaBox without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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