Using the ADS7830 breakout with Arduino involves wiring up the breakout to your Arduino-compatible microcontroller with a potentiometer, installing the Adafruit_ADS7830 library, and running the provided example code.
Wiring
Wire as shown for a 5V board like an Uno. If you are using a 3V board, like an Adafruit Feather, wire the board's 3V pin to the breakout VIN.
Here is an Adafruit Metro wired up to the breakout using the STEMMA QT connector. A potentiometer is connected to analog input 0 (A0):
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Board 5V to breakout VIN (red wire)
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Board GND to breakout GND (black wire)
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Board SCL to breakout SCL (yellow wire)
- Board SDA to breakout SDA (blue wire)
- Breakout VIN to potentiometer positive (red wire)
- Breakout A0 to potentiometer wiper (green wire)
- Breakout GND to potentiometer negative (black wire)
Here is an Adafruit Metro wired up using a solderless breadboard:
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Board 5V to breakout VIN (red wire)
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Board GND to breakout GND (black wire)
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Board SCL to breakout SCL (yellow wire)
- Board SDA to breakout SDA (blue wire)
- Breakout VIN to potentiometer positive (red wire)
- Breakout A0 to potentiometer wiper (green wire)
- Breakout GND to potentiometer negative (black wire)
Library Installation
You can install the Adafruit_ADS7830 library for Arduino using the Library Manager in the Arduino IDE.
Click the Manage Libraries ... menu item, search for Adafruit_ADS7830, and select the Adafruit ADS7830 library:
If asked about dependencies, click "Install all".
If the "Dependencies" window does not come up, then you already have the dependencies installed.
#include <Wire.h>
#include <Adafruit_ADS7830.h>
Adafruit_ADS7830 ad7830;
void setup() {
Serial.begin(115200);
while (!Serial) delay(10); // Wait for console to open
Serial.println("Adafruit ADS7830 Test by Limor Fried/Ladyada");
// Possible arguments to begin():
// begin(); // Uses default I2C address 0x48 and Wire
// begin(0x49); // Uses I2C address 0x49 and Wire
// begin(0x48, &Wire1); // Uses I2C address 0x48 and Wire1
if (!ad7830.begin()) {
Serial.println("Failed to initialize ADS7830!");
while (1);
}
}
void loop() {
for (uint8_t ch = 0; ch <= 7; ch++) {
uint8_t value = ad7830.readADCsingle(ch);
Serial.print(value);
if (ch < 7) {
Serial.print(",\t");
}
}
Serial.println();
delay(100);
}
Upload the sketch to your board and open up the Serial Monitor (Tools -> Serial Monitor) at 115200 baud. You'll see the ADS7830 recognized over I2C. As you turn the potentiometer attached to A0, you'll see the values change.
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