Unit Grove2Grove

SKU:U148

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Description

UNIT-GROVE2GROVE is a Grove expansion Unit with On/Off Control + Current Meter functions. On/Off control adopts switch value, Current meter is 0 - 3.3V analog signal.

Product Feature

• On/Off control: 5V/1A
• Current meter: 0~1000mA

Include

• 1x UNIT-GROVE2GROVE
• 1x HY2.0-4P cable (20cm)

Specifications

Schematic

Size

Example

Arduino

#include <Arduino.h>
#include "driver/adc.h"
#include "esp_adc_cal.h"
#include "math.h"
#include <M5GFX.h>

#define Din_Pin  26
#define Aout_Pin 36
#define groveOn HIGH
#define groveOff LOW

esp_adc_cal_characteristics_t *adc_chars;
float groveVref;

M5GFX display;
M5Canvas canvas(&display);

int get_battery_voltage(void) {
    uint32_t adc_reading = 0;
    // Multisampling
    for (int i = 0; i < 64; i++) {
        adc_reading += adc1_get_raw((adc1_channel_t)ADC1_CHANNEL_0);
    }
    adc_reading /= 64;
    // Convert adc_reading to voltage in mV
    uint32_t voltage =
        (uint32_t)(esp_adc_cal_raw_to_voltage(adc_reading, adc_chars));
    // Serial.printf("Raw: %d\tVoltage: %dmV\r\n", adc_reading, voltage);
    return voltage;
}

void getVerf() {
    float sampleVari = 1.0f;
    while (sampleVari > 0.20f) {
        sampleVari = 1.0f;
        float sampleVol[100] = {};
        float sampleVolAll = 0;
        groveVref = 0;
        for (int i = 0; i < 100; i++) { 
        sampleVol[i] = get_battery_voltage();
        groveVref = groveVref + get_battery_voltage();
        // Serial.println(sampleVol[i]);
        }
        // Serial.println(groveVref);
        for (int i = 0; i < 100; i++) {
            // Serial.println(sampleVol[i]);
            float avrAll = sampleVol[i] - (groveVref / 100.0f);
            // Serial.println(avrAll);
            sampleVolAll += avrAll * avrAll;
        }
        // Serial.println(sampleVolAll);
        sampleVari = sampleVolAll / 99.0f;
        Serial.println(sampleVari);
        Serial.println(groveVref);
    }
    // return groveVref;
}

void setup() {
    Serial.begin(115200);
    pinMode(Din_Pin, OUTPUT);
    digitalWrite(Din_Pin, groveOn);

    display.begin();
    if (display.width() < display.height())
    {
        display.setRotation(display.getRotation() ^ 1);
    }

    // ADC初始化
    gpio_pad_select_gpio(Aout_Pin);
    gpio_set_direction((gpio_num_t)Aout_Pin, GPIO_MODE_INPUT);
    adc1_config_width(ADC_WIDTH_BIT_12);
    adc1_config_channel_atten(ADC1_CHANNEL_0, ADC_ATTEN_DB_11);
    adc_chars = (esp_adc_cal_characteristics_t *)calloc(
        1, sizeof(esp_adc_cal_characteristics_t));
    esp_adc_cal_characterize(ADC_UNIT_1, ADC_ATTEN_DB_11, ADC_WIDTH_BIT_12,
                            3300, adc_chars);
    // groveVref = get_battery_voltage();
    // for (size_t i = 0; i < 5; i++) {
    //     groveVref = groveVref + get_battery_voltage();
    //     Serial.println(groveVref);
    // }
    // groveVref = groveVref / 5.0f / 1000.0f;
    getVerf();
    // Serial.println(groveVref);
    groveVref = groveVref / 100.0f / 1000.0f;
    // Serial.println(groveVref);

    canvas.setColorDepth(1); // mono color
    canvas.createSprite(display.width(), display.height());
    canvas.setTextSize((float)canvas.width() / 160);
    canvas.setTextScroll(true);
}

void loop() {
    // Serial.printf("Raw is %d\n", analogRead(Aout_Pin));
    float groveVol = get_battery_voltage() / 1000.0f;
    // Serial.println(groveVol);
    Serial.printf("Voltage is: %fV\r\n", groveVol);
    canvas.printf("Voltage is: %fV\r\n", groveVol);
    // float groveCurrent = ((groveVol - groveVref) / 50.0f / 0.01f);
    // float groveCurrent = ((groveVol - groveVref) / 83.0f / 0.01f);
    float groveCurrent = ((groveVol - groveVref) / 50.0f / 0.02f);
    Serial.printf("Current is: %fA\r\n", groveCurrent);
    canvas.printf("Current is: %fA\r\n", groveCurrent);
    //digitalWrite(Din_Pin, groveOff);
    canvas.pushSprite(0, 0);
    delay(1000);
}

UIFlow

UIFlow1.0 Unit grove2grove Docs

UIFlow1.0 Unit grove2grove Docs

How to use Unit grove2grove and related API instructions in the UIFlow1.0

UIFlow2.0 Unit grove2grove Docs

UIFlow2.0 Unit grove2grove Docs

How to use Unit grove2grove and related API instructions in the UIFlow2.0

Video