cupl Tag Firmware and Hardware
HT07 is an open-source printed circuit board by cuplsensor, from the cuplsensor/cupltag repository on GitHub. It is a 2-layer board of 54 × 54 mm with 35 parts on 46 nets, routed with 227 tracks and 28 vias.
It is built around the MSP430FR2155TDBTR, HDC2022DEPR and NT3H2111W0FTTJ, with the SIP32431DR3-T1GE3 and CR1220-2 among its other parts. Its parts include 9 capacitors, 5 resistors, 5 connectors, 4 ICs and 1 diode. It belongs with the MSP430 boards of this library.
The project comprises hardware and firmware.
The firmware runs on a low power MSP430 microcontroller. It periodically reads temperature and humidity from an HDC2022 sensor. Readings are base-64 encoded and stored in a URL, which resides on an NFC EEPROM.
When a phone is hovered over a cuplTag, the URL is read and a web browser opens (demo). No app is required. The web application decodes, timestamps and displays readings to the user.
J30 is a 2.54mm pitch 2x4 way header.
| Pin | Name | Direction | Description | Note |
|---|---|---|---|---|
| 1 | TX | Output | UART transmit | Transmit from MSP430 |
| 2 | RX | Input | UART receive | Receive to MSP430 |
| 3 | GND | GND | ||
| 4 | TST | Input | Spy-Bi-Wire Clock | Also TEST signal for BSL entry |
| 5 | GND | GND | ||
| 6 | nRST | I/O | Spy-Bi-Wire Data | Also active low RESET signal |
| 7 | VDD | Input | Power in | +3V3 |
| 8 | nPRG | Input | Prog. Mode Enable | Active low |
CERN Open Hardware Licence Version 2 - Strongly Reciprocal
| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | Conn_01x01_MountingPin | CUPL_FP:MountingHole_2.2mm_M2 | P1, P2, P3, P4 |
| 3 | 100N | CUPL_FP:C_0402_1005Metric | C2, C6, C8 |
| 2 | 10K | CUPL_FP:R_0402_1005Metric | R1, R2 |
| 2 | 22P | CUPL_FP:C_0402_1005Metric | C3, C4 |
| 2 | 47K | CUPL_FP:R_0402_1005Metric | R30, R31 |
| 1 | 0P | CUPL_FP:C_0402_1005Metric | C9 |
| 1 | 100K | CUPL_FP:R_0402_1005Metric | R3 |
| 1 | 10U | CUPL_FP:C_0603_1608Metric | C7 |
| 1 | 18P | CUPL_FP:C_0402_1005Metric | C10 |
| 1 | 1N | CUPL_FP:C_0402_1005Metric | C1 |
| 1 | 32K768 | CUPL_FP:Crystal_SMD_2012-2Pin_2.0x1.2mm_HandSoldering | Y1 |
| 1 | Antenna_Loop | CUPL_FP:Class_6_NXP_7loop_150u | AE1 |
| 1 | CR1220 | CUPL_FP:MPD_BC501SM_CR1220 | BT30 |
| 1 | CUPL | CUPL_FP:logo | LOGO2 |
| 1 | Conn_02x04_Odd_Even | CUPL_FP:PinHeader_2x04_P2.54mm_Vertical | J30 |
| 1 | D_Schottky | CUPL_FP:D_SOD-523 | D1 |
| 1 | HDC2022DEPR | CUPL_FP:HDC2021 | U1 |
| 1 | Jumper_2_Open | CUPL_FP:PinHeader_1x02_P2.54mm_Vertical | JP30 |
| 1 | Logo_Open_Hardware_Small | CUPL_FP:OSHW-Logo_5.7x6mm_SilkScreen | LOGO1 |
| 1 | MEM | CUPL_FP:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP1 |
| 1 | MSP430FR2155TDBT | CUPL_FP:TSSOP-38_4.4x9.7mm_P0.5mm | U3 |
| 1 | NT3H2111W0FTTJ | CUPL_FP:TSSOP-8_3x3mm_P0.65mm | U2 |
| 1 | SCL | CUPL_FP:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP2 |
| 1 | SDA | CUPL_FP:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP3 |
| 1 | SIP32431DR3-T1GE3 | CUPL_FP:SOT-363_SC-70-6 | U4 |
| 1 | SW_Push | CUPL_FP:SW_SPST_EVQP2 | SW30 |
| 1 | SolderJumper_2_Bridged_small | CUPL_FP:SolderJumper-2_Bridged_small | JP31 |
It measures 54 × 54 mm and has 2 copper layers, 1.6 mm thick.
35 parts, built around the MSP430FR2155TDBTR, HDC2022DEPR, NT3H2111W0FTTJ and SIP32431DR3-T1GE3. 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.
From the cuplsensor/cupltag repository on GitHub, at the commit this page was made from: the board is hardware/HT07/HT07.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask cuplsensor before reusing the design.
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