2 layers228.9 × 5.5 mm
TMP117 section 5cm
BerkeleyLab/DxP-sensor-probes
Hardware design for the DxP (Distributed sensor Profiling) sensor probe.
38 parts1
4 layers46.5 × 67.8 mm
Loggerhw v5.0
BerkeleyLab/DxP-data-loggerHardware design for the DxP (Distributed sensor Profiling) data logger that connects to a DxP sensor probe.
- Size
- 46.5 × 67.8 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 62
- Nets
- 85
- Pads
- 297
- Tracks, vias
- 1,163, 322
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 13 Jun 2026
- Updated
- 17 Sep 2026
Overview
Loggerhw v5.0 is an open-source printed circuit board by BerkeleyLab, from the BerkeleyLab/DxP-data-logger repository on GitHub. It is a 4-layer board of 46.5 × 67.8 mm with 62 parts on 85 nets, routed with 1,163 tracks and 322 vias.
It is built around the MX25R3235FM1IH0, TMP117AIDRVR and TPS22919DCK, with the PCF2129AT/2, RFM95W-915S2 and SN74LVC1G175DCK among its other parts. Its parts include 18 capacitors, 13 connectors, 12 resistors, 9 ICs and 2 diodes. It belongs with the sensors and measurement boards and the nRF52 and nRF5x boards of this library.
Main components
9
MX25R3235FM1IH0
SOIC-8-40℃~+85℃ 1.65V~3.6V 100,000 cycles 20 Years 3.2ms 32Mbit 80MHz SPI SOIC-8 NOR FLASH ROHSMXICNOR FLASH
TMP117AIDRVR
WDFN-6-EP(2x2)-55℃~+150℃ 1.7V~5.5V 15.5ms 16bit 3.1uA Factory temperature calibration、Temperature threshold monitoring、Low-power standby、On-chip non-volatile parameter storage、On-chip digital filtering/averaging I2C、SMBus ±0.1℃ WDFN-6-EP(2x2) Temperature Sensors ROHSTexas InstrumentsTemperature Sensors
TPS22919DCK
SC-70-6-40℃~+125℃ 1 1.5A 1.6V~5.5V 89mΩ Active High Load Switch Output discharge function、Soft-start、Overcurrent Protection、Over temperature protection、Short-Circuit Protection SC-70-6 Power Distribution Switches ROHSTexas InstrumentsPower Distribution Switches
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
RFM95W-915S2
LCC-16_16X16mmLCC-16_16X16mm New Arrivals ROHSHopeRF Micro-electronicsUncategorisedSN74LVC1G175DCK
SOT-363-6-40℃~+125℃ 1 1 1.65V~5.5V 10uA 175MHz 2ns 32mA 32mA 3pF 500ps 5ns@5V,50pF 74LVC Series Asynchronous D-Type Reset Rising Edge SOT-363-6 Flip Flops ROHSTexas InstrumentsFlip Flops
TCA9803DGK
TSSOP8Level-Translating I2C Bus Buffer/RepeaterTexas InstrumentsUncategorised
S2B-PH-SM4-TB(LF)(SN)
SMD,P=2mm,卧贴-25℃~+85℃ 1 100V 1x2P 2 2A 2P 2mm 5.5mm 7.9mm 8.6mm Auxiliary Solder Pin Beige Copper alloy PA PH Surface Mount, Right Angle Tin UL94V-0 SMD,P=2mm,卧贴 Wire To Board Connector ROHSJSTWire To Board Connector
U.FL-R-SMT-1
Up to 6GHz Ultra Small Surface Mount Male Coaxial Connectors U.FL SeriesHirose ElectricUncategorised
README
README.mdDxP Data Logger Hardware (LoRa + Distributed Sensor Probes Interface)
This repository only contains the hardware for the DxP (Distributed sensor Profiling) data logger (i.e., the “logger / base station” main board that connects to a DxP sensor probe via a connector.
The sensor probe / sensor-array board designs for DxP probes are released in a separate repository: DxP Sensor Probes.
The firmware for the nRF52832 is released in a separate repository: DxP Firmware.
Hardware overview
Designed for low-power, distributed environmental sensing deployments using the system concept from:
- Wielandt et al., “TDD LoRa and Delta Encoding in Low-Power Networks of Environmental Sensor Arrays for Temperature and Deformation Monitoring” (2023)
Main logger board capabilities:
- LoRa modem: RFM95W (single-channel LoRa)
- Wireless SoC: Nordic nRF52832 (BLE capable)
- Timekeeping: PCF2129AT RTC
- On-board storage: 4 MB SPI flash (data buffering)
- Power: designed for 2× AA operation (1.8 V – 3.6 V range); includes load switching (e.g., TPS22919) to reduce sleep power
- Sensor/probe interface: I2C to connect to distributed sensor probes (supports long arrays through an address bit shift register on the sensor probe).
- Micro SD card slot with load switch for extra storage (e.g., large sensor datasets) and/or for base-station workflows to store data from multiple devices in the network.
Repository contents
KiCad design files (schematic / PCB)
loggerhw_v5.0.schloggerhw_v5.0.kicad_pcbloggerhw_v5.0.kicad_prologgerhw_v5.0.kicad_prlloggerhw_v5.0.pro
KiCad libraries
symbol/footprints/fp-lib-tablefp-info-cache/sym-lib-tableloggerhw_v5.0-cache.lib
Production / fabrication exports
fab/
Documentation
README.mdLICENSE.mdusers.md
Parts
62| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C10, C11, C12, C13, C15, C17, C20 |
| 6 | 10K | Resistor_SMD:R_0402_1005Metric | R5, R7, R8, R9, R11, R12 |
| 4 | Conn_01x01_Female | parts:BK-53 | J5, J6, J8, J11 |
| 2 | 0.8pF C0G | Capacitor_SMD:C_0402_1005Metric | C9, C21 |
| 2 | 100 | Resistor_SMD:R_0402_1005Metric | R13, R19 |
| 2 | 12pF | Capacitor_SMD:C_0402_1005Metric | C5, C6 |
| 2 | Conn_01x06 | Connector_JST:JST_SH_BM06B-SRSS-TB_1x06-1MP_P1.00mm_Vertical | J2, J3 |
| 2 | M2 | MountingHole:MountingHole_2.2mm_M2 | H1, H3 |
| 2 | TPS22919 | Package_TO_SOT_SMD:Texas_R-PDSO-G6 | U5, U9 |
| 2 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP1, TP2 |
| 1 | 100pF | Capacitor_SMD:C_0402_1005Metric | C4 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C7 |
| 1 | 1K | Resistor_SMD:R_0402_1005Metric | R10 |
| 1 | 1uF | Capacitor_SMD:C_0402_1005Metric | C14 |
| 1 | 3.9nH | Inductor_SMD:L_0402_1005Metric | L2 |
| 1 | 470 | Resistor_SMD:R_0402_1005Metric | R14 |
| 1 | 470k (was 10k error) | Resistor_SMD:R_0402_1005Metric | R6 |
| 1 | Antenna_Shield | RF_Antenna:Texas_SWRA117D_2.4GHz_Right | AE1 |
| 1 | Conn_01x10_Male | parts:1x10pin ICSP 2.54mm | J12 |
| 1 | Crystal_GND24 | Crystal:Crystal_SMD_2016-4Pin_2.0x1.6mm | Y1 |
| 1 | DNP | Capacitor_SMD:C_0402_1005Metric | C8 |
| 1 | DNP | Connector_PinHeader_2.54mm:PinHeader_1x18_P2.54mm_Vertical | J4 |
| 1 | DNP | Connector_Coaxial:SMA_Samtec_SMA-J-P-X-ST-EM1_EdgeMount | J9 |
| 1 | DNP | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | LED_BLUE | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | LED_RED | LED_SMD:LED_0603_1608Metric | D3 |
| 1 | LOGO | loggerhw_v5:LBNL_new_compact_logo | G*** |
| 1 | MX25R3235FM1IH0 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 1 | Micro_SD_Card_TF-01 | loggerhw_v5:TF-01A | J1 |
| 1 | PCF2129AT | Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm | U1 |
| 1 | PROBE | Connector_JST:JST_SH_SM06B-SRSS-TB_1x06-1MP_P1.00mm_Horizontal | J10 |
| 1 | RFM95W-915 | loggerhw_v4:XCVR_RFM95W-915S2 | U3 |
| 1 | S2B-PH-SM4-TB(LF)(SN) | Connector_JST:JST_PH_B2B-PH-SM4-TB_1x02-1MP_P2.00mm_Vertical | J7 |
| 1 | SN74LVC1G175DCK | Package_TO_SOT_SMD:Texas_R-PDSO-G6 | U7 |
| 1 | TCA9803 | Package_SO:VSSOP-8_3.0x3.0mm_P0.65mm | U6 |
| 1 | TMP117AIDRVR | Package_SON:WSON-6-1EP_2x2mm_P0.65mm_EP1x1.6mm | U8 |
| 1 | U.FL-R-SMT-1 | Connector_Coaxial:U.FL_Hirose_U.FL-R-SMT-1_Vertical | J20 |
| 1 | nRF52832-QFxx | Package_DFN_QFN:QFN-48-1EP_6x6mm_P0.4mm_EP4.66x4.66mm | U2 |
Questions
How big is the Loggerhw v5.0 PCB?
It measures 46.5 × 67.8 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Loggerhw v5.0 use?
62 parts, built around the MX25R3235FM1IH0, TMP117AIDRVR, TPS22919DCK and PCF2129AT/2. 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 Loggerhw v5.0 KiCad files?
From the BerkeleyLab/DxP-data-logger repository on GitHub, at the commit this page was made from: the board is loggerhw_v5.0.kicad_pcb and its schematic loggerhw_v5.0.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Loggerhw v5.0 design in my own project?
Its repository states no licence, so its author keeps all rights: ask BerkeleyLab before reusing the design.
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