4 layers98 × 48 mm
Esphome pressure
gcormier/esphome-pressure
esphome board with a differential pressure sensor, supporting a variety of power sources
51 parts102
4 layers56.6 × 57.7 mm
Espairqual
gcormier/espairqual6esphome board to interface with a few air quality (PM) sensors
- Size
- 56.6 × 57.7 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 47
- Nets
- 52
- Pads
- 194
- Tracks, vias
- 349, 104
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 1 Dec 2022
- Updated
- 8 Oct 2023
Overview
Espairqual is an open-source printed circuit board by gcormier, from the gcormier/espairqual repository on GitHub. It is a 4-layer board of 56.6 × 57.7 mm with 47 parts on 52 nets, routed with 349 tracks and 104 vias.
It is built around the ESP32-C3-MINI-1, BD9G101G-TR and AMS1117-3.3, with the SS210 among its other parts. Its parts include 10 capacitors, 9 resistors, 8 diodes, 6 connectors and 3 ICs. It belongs with the home automation and IoT and sensors and measurement boards and the ESP32 and RISC-V boards of this library.
Main components
4ESP32-C3-MINI-1
--40℃~+81℃ -89dBm 2.4GHz 350mA 3V~3.6V 82mA ESP32-C3 Chip On-board PCB Antenna UART - WiFi Modules ROHSRF CrazyWiFi Modules
BD9G101G-TR
SOT-23-6-40℃~+105℃@(TA) 1 1.5MHz 1V~29.4V 500mA 6V~42V Adjustable Buck Buck Built-in No SOT-23-6 DC-DC Converters ROHSROHM SemiconductorDC-DC Converters
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SS210
SMA(DO-214AC)-55℃~+150℃ 1 Independent 100V 2A 500uA@100V 850mV@2A SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
README
README.md<img src=images/espairqual_v4.png width=400px />
espairqual
espairqual is an ESP32 based esphome interface for PMSx003 and Panasonic NA-GCJA5 particulate matter (PM) sensors.
It offers a plug and play solution to integrate air quality monitoring with home assistant. It provides 5V to the sensor and 3.3V to the internal electronics.
It can be powered by USC-C, or, by a wider range of input voltages on the screw terminals. It was designed for 24VAC, but will likely work with a slightly broader range of both AC and DC input voltages. The absolute maximum voltage for the switching regulator is 40VDC, which means up to around 28VAC. The minimum DC is approximately 9VDC.
The PCB will fit inside a Hammond 1593KBK case. You can either cut (CNC) or 3D-print the faceplates. I have superglue'd some magnets inside the case so it can stick to my ductwork, although this attenuates the WiFi signal alot.
Programming
The USB-C port can be used to program. The first time, the reset button must be held. After this, all subsequent programming does not require access to the button.
There is also a header for the typical serial flashing with GPIO0(9) and EN exposed. It follows my eflashy32 pinout.
Panasonic SN-GCJA5
I contributed native support for the SN-GCJA5 to esphome. While the PMS5003 is a good sensor, I did receive one dead-on-arrival from Aliexpress. The Panasonic sensor is cheaper, smaller, available from tier-1 distributors (eg. Digikey) and has a 5+ year life expectancy. It has internal compensation for the fan, photo diode and laser diode.
The connector is JST-GH (1.25mm) series.
Parts
47| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 10uF 50V | Capacitor_SMD:C_1206_3216Metric | C1, C6, C7, C8, C9, C11, C12 |
| 7 | SS210 | Diode_SMD:D_SMA | D1, D2, D3, D4, D5, D6, D7 |
| 6 | 5k1 | Resistor_SMD:R_0402_1005Metric | R1, R3, R4, R5, R10, R11 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 2 | 680 | Resistor_SMD:R_0402_1005Metric | R2, R6 |
| 1 | +3.3V | TestPoint:TestPoint_Pad_D2.5mm | TP3 |
| 1 | +5V | TestPoint:TestPoint_Pad_D2.5mm | TP1 |
| 1 | 0.1u 25v | Capacitor_SMD:C_0603_1608Metric | C4 |
| 1 | 100uF 50V | Capacitor_SMD:CP_Elec_8x10 | C10 |
| 1 | 140mA hold / 340mA trip mSMD014 | Fuse:Fuse_1812_4532Metric | F1 |
| 1 | 15nF | Capacitor_SMD:C_0603_1608Metric | C5 |
| 1 | 24VAC | Connector_Phoenix_MC:PhoenixContact_MC_1,5_2-G-3.81_1x02_P3.81mm_Horizontal | J1 |
| 1 | 3k9 | Resistor_SMD:R_0402_1005Metric | R12 |
| 1 | 6.8uH | Inductor_SMD:L_Sunlord_SWPA5012S | L1 |
| 1 | 600@100MHz | Inductor_SMD:L_0805_2012Metric | FB1 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | AUX | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical_SMD_Pin1Left | J7 |
| 1 | BD9G101G | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | ESP32-C3-MINI-1 | Espressif:ESP32-C3-MINI-1 | U4 |
| 1 | GCJA5 | Connector_JST:JST_GH_SM05B-GHS-TB_1x05-1MP_P1.25mm_Horizontal | J5 |
| 1 | GND | TestPoint:TestPoint_Pad_D2.5mm | TP2 |
| 1 | PMSX003 | Connector_Molex:Molex_PicoBlade_53261-0871_1x08-1MP_P1.25mm_Horizontal | J2 |
| 1 | PWR | LED_SMD:LED_0805_2012Metric | D8 |
| 1 | RESET | Button_Switch_SMD:SW_Push_1P1T_XKB_TS-1187A | SW1 |
| 1 | USBC | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J4 |
| 1 | eflashy32 | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J3 |
Questions
How big is the Espairqual PCB?
It measures 56.6 × 57.7 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Espairqual use?
47 parts, built around the ESP32-C3-MINI-1, BD9G101G-TR, AMS1117-3.3 and SS210. 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 Espairqual KiCad files?
From the gcormier/espairqual repository on GitHub, at the commit this page was made from: the board is pcb/espairqual.kicad_pcb and its schematic pcb/espairqual.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Espairqual design in my own project?
Its repository states no licence, so its author keeps all rights: ask gcormier before reusing the design.
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