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LoRaModem

wangyeee·OpenHardware·LoRaModem/LoRaModem.kicad_pcb

LoRaModem PCB layout, top view — open source STM32 board by wangyeee
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About the LoRaModem PCB

LoRaModem is an open source STM32 PCB design by wangyeee, published on GitHub under the BSD-3-Clause license. It is a 2-layer board measuring 24 × 36 mm, with 48 components from 31 distinct parts.

Its main chip is the STM32F103CBTx, from the STM32 family. Other key parts include the Ra-02, W25X40, SPX3819, TJA1050 and 74AHC1G86. By type, the board carries 17 capacitors, 9 diodes, 8 resistors, 6 ICs, 3 connectors and 3 test points.

It belongs with the robotics & motion and rf & radio designs in this gallery.

From the project

Collections of hardware design related to my drone project.

1. Serial port (Full-duplex): This port connects to a dedicate GPS receiver, or it can read GPS messages from standard telemetry (such as MavLink) port from an autopilot. 2. CAN bus: This is used to talk to the autopilot, as well as other devices on the same bus. Currently there is no plan for software support. 3. Serial port (Half-duplex): This is a TX only serial port, with built-in inverter which can be used to generate S.Bus signals. It could be used to control external severos for custom purposes. 4. Flash memory: The onboard flash chip can be used to store information like device ID, as…

Main components on the LoRaModem

Ra-02W25X40STM32F103CBTxSPX3819TJA105074AHC1G86

LoRaModem bill of materials (BOM)

48 components, 31 distinct parts.

QtyPartRefs
1
Ra-02
U1
1
W25X40
U2
1
STM32F103CBTx
U3
1
SPX3819
U4
1
TJA1050
U5
1
74AHC1G86
U6
1
8MHz
Y1
2
CONN_01X04
J1, J3
1
CONN_01X03
J2
1
Jumper
JP1
1
SWDIO
TP1
1
SWCLK
TP2
1
SWO
TP3
3
1A
D1, D8, D9
1
PESD3V3
D2
1
PESD3V3
D3
1
RED
D4
1
BLUE
D5
1
GREEN
D6
1
PESDCAN
D7
Show 11 more
QtyPartRefs
10
100nF
C1, C3, C4, C8, C10, C11, C12, C13 +2
1
22uF
C2
2
2.2uF
C5, C7
2
10nF
C6, C16
1
10uF
C9
1
1uF
C14
1
47K
R1
2
10K
R2, R3
1
120
R4
3
470
R5, R6, R7
1
1.5K
R8

LoRaModem design files

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

LoRaModem: common questions

What microcontroller does the LoRaModem use?

The LoRaModem is built around the STM32F103CBTx, from the STM32 family.

How big is the LoRaModem PCB?

The LoRaModem measures 24 × 36 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the LoRaModem?

48 components, from 31 distinct parts. The full bill of materials is listed on this page.

Where can I download the LoRaModem design files?

From the wangyeee/OpenHardware repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the LoRaModem design in my own project?

Yes, under the terms of its BSD-3-Clause license, which wangyeee chose for the repository.

Can I test firmware for the LoRaModem 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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