HardLabs

Esp32LoraBoard

vrees·Esp32LoraBoard·kicad/Esp32LoraBoard/Esp32LoraBoard.kicad_pcb

Esp32LoraBoard PCB layout, top view — open source ESP32 board by vrees

About the Esp32LoraBoard PCB

Esp32LoraBoard is an open source ESP32 PCB design by vrees, published on GitHub. It is a 2-layer board measuring 72 × 65 mm, with 54 components from 33 distinct parts.

Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the LM3940IMP-3.3 and RFM95W-868S2. By type, the board carries 15 resistors, 10 capacitors, 9 connectors, 7 test points, 6 transistors and 3 ICs.

It belongs with the rf & radio, power & battery and usb & debug tools designs in this gallery.

From the project

ESP32 board including Lora RFM95 module optimized for low power deep sleep operation.

After PowerOn without sending any Lora data

Switched off all peripheral components and shutdown the RFM95W lora chip.

* Clone this project and open in platformio.

* Clone ttn-esp32 into lib subdir. Switch to branch dev to get it running. More info see https://github.com/manuelbl/ttn-esp32

* Following has to be changed under in ./lib/ttn-esp32 Change following:

src/lmic/config.h #define USEORIGINALAES

Main components on the Esp32LoraBoard

LM3940IMP-3.3ESP32-WROOM-32RFM95W-868S2

Esp32LoraBoard bill of materials (BOM)

54 components, 33 distinct parts.

QtyPartRefs
1
LM3940IMP-3.3
U1
1
ESP32-WROOM-32
U2
1
RFM95W-868S2
U3
1
UMH3N
Q1
3
Si2302DS_NMOS
Q2, Q4, Q6
2
Si2301DS_PMOS
Q3, Q5
1
USB_B_Micro
J1
1
Power-Selector
J2
1
Testpoints
J3
1
ESP_PROG_JTAG
J4
1
Prog
J5
1
ext_Measure
J6
1
Measurement-Selector
J7
1
OLED_128x64
J8
1
Pin1-to-GND
J9
1
Antenna_Shield
AE1
1
LiFePo-Batterie
BT1
1
Rotary_Encoder
SW1
1
Reset
SW2
1
U_BATT_MEASURE
TP1
Show 13 more
QtyPartRefs
1
U_EXT_ENABLE
TP2
1
VCC_2
TP3
1
U_EXT_MEASURE
TP4
1
U_BAT_ENABLE
TP5
2
GND
TP6, TP7
4
100n
C1, C4, C7, C8
1
10u
C2
3
1u
C3, C9, C10
1
220n
C5
1
1n
C6
10
10k
R1, R2, R3, R4, R9, R10, R11, R13 +2
2
optional
R5, R6
3
100k
R7, R8, R12

Esp32LoraBoard design files

The KiCad project lives in the vrees/Esp32LoraBoard repository on GitHub; these links point at the commit this page was built from.

Esp32LoraBoard: common questions

What microcontroller does the Esp32LoraBoard use?

The Esp32LoraBoard is built around the ESP32-WROOM-32, from the ESP32 family.

How big is the Esp32LoraBoard PCB?

The Esp32LoraBoard measures 72 × 65 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Esp32LoraBoard?

54 components, from 33 distinct parts. The full bill of materials is listed on this page.

Where can I download the Esp32LoraBoard design files?

From the vrees/Esp32LoraBoard repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Esp32LoraBoard design in my own project?

The repository has no license, so all rights stay with vrees. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Esp32LoraBoard without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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