本文提供了基于ESP32開發板快速完成甲醛傳感器數據讀取的方式，可以用于開發甲醛檢測儀。

準備

• 傳感器：達特WZ-S甲醛傳感器

• 開發板：安信可ESP32 NodeMCU-32S

• 開發環境：Arduino

• 依賴庫： WZ (https://github.com/leonlucc/WZ)

引腳連接

代碼

主動模式讀數

#include 'WZ.h'/////////////////////////// ESP32-S NodeMCU Board/*

 * There are three serial ports on the ESP32 known as UART0, UART1 and UART2.

 *

 * UART0 (GPIO1 - TX0, GPIO3 - RX0) is used to communicate with the ESP32 for programming and during reset/boot.

 * UART1 (GPIO10 - TX1, GPIO9 - RX1) is unused and can be used for your projects. Some boards use this port for SPI Flash access though

 * UART2 (GPIO17 - TX2, GPIO16 - RX2) is unused and can be used for your projects.

 *

 */WZ wz(Serial2); // UART2WZ::DATA hcho_data;void setup(){

    Serial.begin(115200);

    Serial2.begin(9600);

    // wz.activeMode();}void loop(){

    if (wz.read(hcho_data))

    {

        Serial.print('HCHO (ppd): ');

        Serial.println(hcho_data.HCHO_PPB);

        Serial.print('HCHO (ug/m3): ');

        Serial.println(hcho_data.HCHO_UGM3); // no data here, 0 returned

        Serial.println();

    }

    // Do other stuff...}

被動模式讀數

#include 'WZ.h'/////////////////////////// ESP32-S NodeMCU Board/*

 * There are three serial ports on the ESP32 known as UART0, UART1 and UART2.

 *

 * UART0 (GPIO1 - TX0, GPIO3 - RX0) is used to communicate with the ESP32 for programming and during reset/boot.

 * UART1 (GPIO10 - TX1, GPIO9 - RX1) is unused and can be used for your projects. Some boards use this port for SPI Flash access though

 * UART2 (GPIO17 - TX2, GPIO16 - RX2) is unused and can be used for your projects.

 *

 */WZ wz(Serial2); // UART2WZ::DATA hcho_data;void setup(){

    Serial.begin(115200);

    Serial2.begin(9600);

    wz.passiveMode();}void loop(){

    wz.requestRead();

    if (wz.readUntil(hcho_data))

    {

        Serial.print('HCHO (ppd): ');

        Serial.println(hcho_data.HCHO_PPB);

        Serial.print('HCHO (ug/m3): ');

        Serial.println(hcho_data.HCHO_UGM3);

        Serial.println();

    }

    delay(1000);

    // Do other stuff...}