HardLabs

Sensor node

mirra-org·mirra·pcb_boards/sensor_node/sensor_node.kicad_pcb

Sensor node PCB layout, top view — open source ESP32 board by mirra-org

About the Sensor node PCB

Sensor node is an open source ESP32 PCB design by mirra-org, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 93 × 93 mm, with 51 components from 32 distinct parts.

Its main chip is the ESP32-WROOM-32D-N16, from the ESP32 family. Other key parts include the PCF2129AT/2,518, SIP32431DR3-T1GE3, RF-LORA-868-SO, FT232RL and RP604K331A-TR. By type, the board carries 14 resistors, 13 capacitors, 7 ICs, 4 connectors, 4 diodes and 3 battery holders.

It belongs with the sensors and iot & wireless designs in this gallery.

From the project

Firmware, web app/server and documentation for the MIRRA project.

Microclimate Instrument for Real-time Remote Applications

⚠️ This is a research project. Limited testing has been performed and reliability of data storage/sensor readout is not guaranteed. Use with caution. ⚠️

The radiation is 3D printed and designed using OpenSCAD. All design files can eb found in 3dprinting`. They can be printed using an extrusion printer, with minimal post-processign (no supports).

Main components on the Sensor node

PCF2129AT/2,518SIP32431DR3-T1GE3ESP32-WROOM-32D-N16RF-LORA-868-SOFT232RLRP604K331A-TR

Sensor node bill of materials (BOM)

51 components, 32 distinct parts.

QtyPartRefs
1
PCF2129AT/2,518
PCF2129T
IC1
2
SIP32431DR3-T1GE3
SiP32431
U1, U8
1
ESP32-WROOM-32D-N16
ESP32-WROOM-32
U2
1
RF-LORA-868-SO
U3
1
FT232RL
U4
1
RP604K331A-TR
RP604x
U7
1
1985098
Screw_Terminal_01x15
J1
1
944-10-080-00
Conn_02x03_Odd_Even
J2
1
105017-0001
USB_B_Micro
J3
1
1985069
Screw_Terminal_01x12
J4
1
Antenna
AE1
1
SMTM1225
Battery_Cell
BT1
1
B2B-EH-A(LF)(SN)
Battery_Cell
BT2
1
12BH311P-GR
Battery_Cell
BT3
1
KMR621NGLFS
BOOT
IO4
1
4-103321-5
Jumper_3_Open
JP2
1
KMR621NGLFS
RESET
RESET1
1
LED
D1
2
TLMY1000
LED
D2, D4
1
TLMY1000
D_Schottky
D3
Show 12 more
QtyPartRefs
1
MI0805K400R-10
Ferrite_Bead
FB1
1
TYS40182R2M-10
2.2uH
L1
1
100nF
C1
5
CGA3E2X8R1E104K
100nF
C4, C5, C7, C9, C10
2
CGA5L1X7R1C685MC
6.8µF
C6, C11
3
TMK325BJ106KM-P
10uF
C13, C14, C17
2
TMK316BBJ226ML-T
22uF
C16, C18
7
APC0603B10K0N
10k
R1, R2, R4, R5, R8, R14, R15
1
RC0603JR-07330RL
330R
R3
3
RC0603FR-07750RL
750R
R6, R7, R16
1
CRCW060310M0FKEAC
10M
R9
2
CRCW06034K70JNEAC
4.7k
R10, R12

Sensor node design files

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

Sensor node: common questions

What microcontroller does the Sensor node use?

The Sensor node is built around the ESP32-WROOM-32D-N16, from the ESP32 family.

How big is the Sensor node PCB?

The Sensor node measures 93 × 93 mm, has 2 copper layers and is 0.8 mm thick.

How many components are on the Sensor node?

51 components, from 32 distinct parts. The full bill of materials is listed on this page.

Where can I download the Sensor node design files?

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

Can I use the Sensor node design in my own project?

Yes, under the terms of its Apache-2.0 license, which mirra-org chose for the repository.

Can I test firmware for the Sensor node 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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