2 layers100 × 45.5 mm
Siot gateway particle
simpleiot/hardware
Hardware designs for IoT devices and sensor nodes.
25 parts9Apache-2.0
2 layers98.9 × 78 mm
Siot gateway particle io
simpleiot/hardware9Hardware designs for IoT devices and sensor nodes.
- Size
- 98.9 × 78 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 28
- Nets
- 56
- Pads
- 118
- Tracks, vias
- 48, 8
- Pours
- 8
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 21 Sep 2019
- Updated
- 4 Mar 2021
Overview
Siot gateway particle io is an open-source printed circuit board by simpleiot, from the simpleiot/hardware repository on GitHub, published under the Apache-2.0 licence. It is a 2-layer board of 98.9 × 78 mm with 28 parts on 56 nets, routed with 48 tracks and 8 vias.
It is built around the DS2483R+T, MDC3105LT1G and SMBJ5.0A. Its parts include 6 capacitors, 6 ICs, 3 resistors, 3 diodes and 3 connectors. It belongs with the home automation and IoT boards of this library.
Main components
3
DS2483R+T
SOT-6-40℃~+85℃ 1.71V~5.25V 300uA I2C SOT-6 Interface - Specialized ROHSMaxim Integrated (Analog Devices)Interface - Specialized
MDC3105LT1G
SOT-23-40℃~+85℃ 1 250mA 3V~5V SOT-23 Relay / Coil Drivers ROHSonsemiRelay / Coil Drivers
SMBJ5.0A
DO-214AA(SMB)-65℃~+150℃ 5V 600W@10/1000us 65.3A@10/1000us 7V 800uA 9.2V TVS Unidirectional DO-214AA(SMB) ESD and Surge Protection (TVS/ESD) ROHSMDDESD And Surge Protection (TVS/ESD)
README
rpi-odroid-expansion/README.mdrPI/Odroid Exansion Board
Features
This board is designed to provide a number of expansion features to Raspberry PI and ODROID-C4 SBCs.
- CAN
- RS485
- 1-wire
- LCD/Touchscreen
- pass through rPI expansion connector to provide use of unused pins.
- XBee socket (Digi, Nimbelink, etc radios)
- reference design: https://nimbelink.com/products/raspberry-pi-skywire-adapter/
- supports both standard 40-pin expansion and compute module
- LoraWan radio
MPU Interface
MPU/MCU communication link
There is a UART and SPI ports (todo) wired between the host MPU and the MCU on the expansion board.
- UART is likely simplest as the existing CAN firmware implements a USB serial port. Also, for RS485, it is just a pass through.
- SPI would allow us to run both CAN and RS485 at the same time.
- may only be two hardware SPI chip selects, so not sure how well more than 2 SPI devices will work.
MCU Implementation
A STM32F042K4Tx MCU is used to implement the following functionality:
- CAN Interface
- Board ID EEPROM (implements i2c slave)
Reference
CAN
Can is typically implemented using a SPI CAN controller (ex MCP2517), but these devices do not offer any buffering so are a poor choice for non real-time operating systems like Linux. Thus, we've chosen to use a MCU to provide the CAN interface and hopefully leverage firmware from the following projects:
HAT ID EEPROM
RS485
Parts
28| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | MountingHole | MountingHole:MountingHole_3.5mm | H1, H2, H3, H4 |
| 2 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C5, C6 |
| 2 | 100uF_6.3V | Capacitor_SMD:C_1210_3225Metric | C3, C4 |
| 2 | 150 | Resistor_SMD:R_0603_1608Metric | R2, R3 |
| 2 | DS2483R | Package_TO_SOT_SMD:TSOT-23-6 | U3, U4 |
| 2 | G5LE-14_DC5 | digikey-footprints:Relay_THT_G5LE-14 | RLY1, RLY2 |
| 2 | MDC3105LT1G | Package_TO_SOT_SMD:SOT-23 | U5, U6 |
| 2 | SMBJ5.0A | Diode_SMD:D_SMB | D2, D3 |
| 2 | xConnect_smd | BEC:xConnect_smd | J1, J2 |
| 1 | 100pF | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | 220K | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 33uH_2.5A_84mOhm | BEC:CDRH105R | L1 |
| 1 | 4.7uF_100V | Capacitor_SMD:C_2220_5650Metric | C1 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J3 |
| 1 | D_1A_30V_310mV | Diode_SMD:D_PowerDI-123 | D1 |
| 1 | LTC3630 | Package_SO:MSOP-12-16-1EP_3x4mm_P0.5mm_EP1.65x2.85mm | U2 |
| 1 | Particle_Mesh | BEC:feather | U1 |
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Questions
How big is the Siot gateway particle io PCB?
It measures 98.9 × 78 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Siot gateway particle io use?
28 parts, built around the DS2483R+T, MDC3105LT1G and SMBJ5.0A. 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 Siot gateway particle io KiCad files?
From the simpleiot/hardware repository on GitHub, at the commit this page was made from: the board is siot-gateway-particle-io/siot-gateway-particle-io.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Siot gateway particle io 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).