2 layers93 × 93 mm
Sensor node
mirra-org/mirra
Firmware, web app/server and documentation for the MIRRA project.
58 partsApache-2.0
2 layers76 × 92.5 mm
Pcb gateway
mirra-org/mirraFirmware, web app/server and documentation for the MIRRA project.
- Size
- 76 × 92.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 86
- Nets
- 119
- Pads
- 357
- Tracks, vias
- 1,030, 252
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 5 Nov 2024
- Updated
- 2 Jun 2025
Overview
Pcb gateway is an open-source printed circuit board by mirra-org, from the mirra-org/mirra repository on GitHub, published under the Apache-2.0 licence. It is a 2-layer board of 76 × 92.5 mm with 86 parts on 119 nets, routed with 1,030 tracks and 252 vias.
It is built around the ESP32-WROOM-32, RF-LORA-868-SO and SIM800L, with the FT232RL, NLHV4052D and PCF2129AT/2 among its other parts. Its parts include 26 capacitors, 20 resistors, 12 ICs, 4 diodes and 4 connectors. It belongs with the ESP32 boards of this library.
Main components
8
ESP32-WROOM-32
SMD,18x25.5mm-40℃~+85℃ -98dBm 2.4GHz 2.7V~3.6V 20dBm Bluetooth4.2 ESP32-DOWDQ6 UART、SDIO、SPI、I2C、GPIO、PWM、ADC、DAC SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi ModulesRF-LORA-868-SO
-LoRa ModulesRF Solutions
SIM800L
SMD,17.8x15.8mm-40℃~+85℃ 3.4V~4.4V 850MHz、900MHz、1800MHz、1900MHz GPIO、ADC、PCM、SIM card GPRS、GSM PCM voice function、DTMF function、CMUX function、USSD function SMD,17.8x15.8mm 2G/3G/4G/5G Modules ROHSSIMCom Wireless Solutions2G/3G/4G/5G Modules
FT232RL
SSOP-28-208mil-40℃~+85℃ 3.3V~5.25V、4V~5.25V USB 2.0 USB to UART SSOP-28-208mil USB Converters ROHSFTDIUSB Converters
NLHV4052D
SOIC-161:1 2 25ns 280Ω 3V~18V Fault protection、Level shifting SOIC-16 Analog Switches, MultiplexersonsemiAnalog Switches, Multiplexers
PCF2129AT/2
SOIC-20-300mil-40℃~+85℃ 0.7uA 1.8V~4.2V 700nA Built-in I2C Watchdog timer、Temperature compensation、Backup power management and battery charging、Battery low-voltage detection、Timestamp function、Programmable clock output、Alarm function、Locking and tamper-proof、Periodic interrupt output Yes SOIC-20-300mil Real Time Clocks ROHSNXP SemiconductorsReal Time Clocks
TXS0104ED
SOIC-14-40℃~+85℃ 1 1.65V~3.6V 2.3V~5.5V 24Mbps 4 Auto Direction Detection Bidirectional Push-Pull、Open-drain SOIC-14 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
S8050
SOT-23-55℃~+150℃ 1 NPN 100MHz 100nA 120 25V 300mW 500mA 5V 600mV NPN SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)
README
README.mdMIRRA
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. ⚠️
3D Designs
The radiation is 3D printed and designed using OpenSCAD. All design files can eb found in 3d_printing. They can be printed using an extrusion printer, with minimal post-processign (no supports).
PCB designs
All PCBs are designed with KiCAD and located in the pcb_boards directory. Components also contain ordering codes for Mouser and/or Farnell, such that the design is completely rebuilable.
Embedded Code
The software for the sensor node and gateway are located in the firmware folder. The easiest way to build and upload the code is using PlaformIO.
Server / web-interface
Use docker-compose to start the webserver and related components (such as MQTT server, graphena...) from the webserver folder. Some services are password protected, the passwords are (for now) also included in the docker-compose file.
Licence
Apache-2.0 License, see LICENSE file.
Parts
86| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4, R11, R12, R17, R18, R21, R22, R23, R24 |
| 11 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C9, C11, C12, C14, C16, C17, C20, C24, C28, C29 |
| 6 | 1uF | Capacitor_SMD:C_0603_1608Metric | C8, C18, C23, C26, C27, C30 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 4 | SiP32431 | Package_TO_SOT_SMD:SOT-363_SC-70-6 | U5, U7, U10, U13 |
| 3 | 10uF | Capacitor_SMD:C_1210_3225Metric | C2, C3, C4 |
| 3 | 4.7uF | Capacitor_SMD:C_1206_3216Metric | C10, C21, C22 |
| 3 | LED | LED_SMD:LED_0603_1608Metric | D1, D3, D4 |
| 2 | 0R | Resistor_SMD:R_0603_1608Metric | R15, R16 |
| 2 | 12k | Resistor_SMD:R_0603_1608Metric | R19, R20 |
| 2 | 22uF | Capacitor_SMD:C_1210_3225Metric | C6, C7 |
| 2 | 750R | Resistor_SMD:R_0603_1608Metric | R7, R8 |
| 2 | Battery_Cell | gems_footprints:Eagle_Battery_Holder_A_12BH311P-GR | BT1, BT5 |
| 2 | Battery_Cell | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | BT2, BT6 |
| 2 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J4, J5 |
| 2 | Jumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm | JP2, JP3 |
| 2 | S8050 | gems_footprints:SOT-23-var | Q1, Q2 |
| 2 | SW_Push | Button_Switch_SMD:SW_SPST_KMR2 | SW2, SW3 |
| 1 | 2.2uH | gems_footprints:L_L4mm_D4mm_H1.8mm | L1 |
| 1 | 330R | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | 6.8uF | Capacitor_SMD:C_1206_3216Metric | C13 |
| 1 | 60R | Resistor_SMD:R_0603_1608Metric | R10 |
| 1 | Battery_Cell | gems_footprints:Renata_Battery_Holder_SMTM1125 | BT3 |
| 1 | Conn_02x03_Counter_Clockwise | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J3 |
| 1 | Conn_Coaxial | Connector_Coaxial:SMA_Amphenol_901-144_Vertical | AE2 |
| 1 | D_Schottky | Diode_SMD:D_SMB | D2 |
| 1 | ESP32-WROOM-32 | RF_Module:ESP32-WROOM-32 | U1 |
| 1 | FT232RL | Package_SO:SSOP-28_5.3x10.2mm_P0.65mm | U9 |
| 1 | Ferrite_Bead | Inductor_SMD:L_0805_2012Metric | FB1 |
| 1 | Jumper_3_Open | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP1 |
| 1 | NLHV4052 | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U6 |
| 1 | PCF2129AT | gems_footprints:SO20 | IC1 |
| 1 | RF-LORA-868-SO | gems_footprints:RF-LORA-868-SMT | U4 |
| 1 | RP604x | gems_footprints:DFN_12_Pin_2.7x3mm_P0.5mm | U3 |
| 1 | SIM800L | gems_footprints:SIM800L_MODULE | U8 |
| 1 | SW_SPST | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | SW1 |
| 1 | TXS0104E | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U12 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Molex-105017-0001 | J2 |
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Questions
How big is the Pcb gateway PCB?
It measures 76 × 92.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Pcb gateway use?
86 parts, built around the ESP32-WROOM-32, RF-LORA-868-SO, SIM800L and FT232RL. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Pcb gateway KiCad files?
From the mirra-org/mirra repository on GitHub, at the commit this page was made from: the board is pcb_boards/gateway/pcb_gateway.kicad_pcb and its schematic pcb_boards/radiation_shield/radiation_shield.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pcb gateway design in my own project?
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).