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pressure sensor on wifi

1 year ago 221
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Description

Differential pressure sensor is converting pressure 0-2000mbars into 0-5V signal.

This signal after being treated is send to ADC and then the digital value is sent through i2c to wemos D1 mini.

The wemos is displaying the value of the pressure on an oled display and through a webserver page accessible through its wifi access point.

A 12bit ADC is used to have better resolution, as the ADC on wemos (pin A0) is only a 10bit ADC.

Documents

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PCB_2020-02-29 18:07:46

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BOM

ID Name Designator Footprint Quantity
1 HSMG-C150 LED1 LED1206-R-RD 1
2 Header-Male-2.54_1x10 H1 HDR-TH_10P-P2.54-V 1
3 100pF C3-0805 1206 1
4 330 R1 1206 1
5 PHOENIX J1 PHOENIX PKG 1
6 SSD1306-128x64-OLED-0.96 PCB1 SSD1306 1
7 WEMOS D1 with DHT22 shield, running as Wifi Access point U1 WEMOS D1 1
8 100 R3 R1206 1
9 100nF C1-0805,C2-0805 C0805 2
10 33K 1% R4,R5 R1206 2
11 20K 1% R2 R1206 1
12 MCP6022-XP U3 PDIP8_300MC 1
13 Header-Female-2.54_1x6 P1 HDR-TH_6P-P2.54-V 1

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