

WiFIR
A WiFi connected IR blaster to control heatpumps
- Size
- 30 × 62 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 31
- Pads
- 104
- Tracks, vias
- 304, 53
- Pours
- 9
- Routed
- Yes
- KiCad
- KiCad 5 (file 20210228)
- Created
- 16 Mar 2020
- Updated
- 28 Dec 2022
Overview
WiFIR is an open-source printed circuit board by Duckle29, from the Duckle29/WiFIR repository on GitHub, published under the BSD-3-Clause licence. It is a 2-layer board of 30 × 62 mm with 34 parts on 31 nets, routed with 304 tracks and 53 vias.
It is built around the WEMOS D1 MINI, AHT20 and SGP30, with the RT9193-3.3, PCA9306DC1 and TPS54302 among its other parts. Its parts include 10 resistors, 8 capacitors, 7 ICs, 2 diodes and 1 transistor. It belongs with the radio and wireless boards and the ESP8266 boards of this library.
Main components
10WEMOS D1 MINI
A mini wifi board with 4MB flash based on ESP-8266EX, hardware version 4.0.0.LolinUncategorisedAHT20
SMD-40℃~+120℃ 0%RH~100%RH 2.2V~5.5V 20bit 570uA I2C ±0.3℃ ±2%RH SMD Temperature and Humidity Sensor ROHSAosong ElecTemperature And Humidity SensorSGP30
Gas sensor for indoor air quality applications. Datasheet: https://www.sensirion.com/file/datasheet_sgp30/SensirionUncategorisedRT9193-3.3
SOT-23-5-20℃~+60℃@(Ta) 1 25uA 3.3V 300mA 35mV@(10mA)、280mV@(100mA) 75dB@(1kHz) 7V Enable Fixed Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTDSEMICVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsPCA9306DC1
VSSOP-8-0.5mm-40℃~+105℃ 1.8V~5.5V 1V~3.6V 2 2 2Mbps Automatic direction detection、Output enable high-impedance Bidirectional Level translator Open-drain SMBus、I2C VSSOP-8-0.5mm Translators, Level Shifters ROHSNXP SemiconductorsTranslators, Level ShiftersTPS54302
UncategorisedTexas InstrumentsTSOP38236
SIP-3-2.54mm-25℃~+85℃ 10mW 2.5V~5.5V 350uA 36kHz 45m ±45° SIP-3-2.54mm Infrared Remote Receiver (IRM) ROHSVishay IntertechnologyInfrared Remote Receiver (IRM)VSML3710-GS18
PLCC-2(2.8x3)-40℃~+85℃ 1.35V 100mA 160mW 4mW/sr@IF=100mA 5V 60° 940nm PLCC-2(2.8x3) Infrared LED Emitters ROHSVishay IntertechnologyInfrared LED EmittersSLO0530H6R8MTT
SMD,5.4x5.2mm3.5A 4A 6.8uH 66mΩ Molded Inductor ±20% SMD,5.4x5.2mm Molding Power Inductors ROHSSunltechPower InductorsFDN339AN
SOT-23-55℃~+150℃ 1 N-channel 120pF 1V 1W 20V 25mΩ@4.5V 300pF 4nC@4.5V 5.5A 80pF SOT-23 MOSFETs ROHSTECH PUBLICMOSFETs
README
readme.mdWiFIR
The WiFIR is a WiFi IR blaster / remote, based around a WeMos D1 mini (ESP8266)
Firmware
The WiFIR was made from a need to control a heatpump / ac to allow pre-heating of a summer-house before arriving. It can however control anything IR controlled.

Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 4k7 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2, R3, R4, R5, R10 |
| 2 | 1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C6, C8 |
| 2 | 22k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R9 |
| 2 | LOGO | Graphics:Kiwi-silk | G***, G*** |
| 2 | VSML3710-GS18 | LED_SMD:LED_PLCC-2 | D1, D2 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R8 |
| 1 | 100nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1 |
| 1 | 22nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C7 |
| 1 | 22uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5 |
| 1 | 22uF: CL10A226MP8NUNE | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4 |
| 1 | 27R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R7 |
| 1 | 4.5-18V | Connector_BarrelJack:BarrelJack_Horizontal | J1 |
| 1 | 470R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R6 |
| 1 | 47pF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3 |
| 1 | 6.8uH | Inductor_SMD:L_6.3x6.3_H3 | L1 |
| 1 | AHT20 | Package_LGA:Asair_LGA-6_3x3mm_P1mm | U6 |
| 1 | AP131-18 | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | FDN339AN | Package_TO_SOT_SMD:SOT-23_Handsoldering | Q1 |
| 1 | PCA9306DC1 | Package_SO:VSSOP-8_2.3x2mm_P0.5mm | U7 |
| 1 | SGP30 | Sensor:Sensirion_DFN-6-1EP_2.45x2.45mm_P0.8mm_EP1.25x1.7mm | U5 |
| 1 | SW_SPST | Button_Switch_SMD:SW_Push_1P1T_NO_6x6mm_H9.5mm | SW1 |
| 1 | TPS54302 | Package_TO_SOT_SMD:SOT-23-6 | U3 |
| 1 | TSOP38236 | OptoDevice:Vishay_MINICAST-3Pin | U2 |
| 1 | WeMos_D1_mini | Module:WEMOS_D1_mini_light | U1 |
The 33 most common of 34 parts.
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Questions
How big is the WiFIR PCB?
It measures 30 × 62 mm and has 2 copper layers, 1.6 mm thick.
What parts does the WiFIR use?
34 parts, built around the WEMOS D1 MINI, AHT20, SGP30 and RT9193-3.3. 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 WiFIR KiCad files?
From the Duckle29/WiFIR repository on GitHub, at the commit this page was made from: the board is pcb.kicad_pcb and its schematic MCU+IO.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the WiFIR design in my own project?
Its repository publishes it under the BSD-3-Clause licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).