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using custom wire pins, useful for esp-based boads #5

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7b7b32e
using custom wire pins, useful for esp-based boads
martinhanes Jan 27, 2019
e815c57
fixed return type to void
martinhanes Jan 27, 2019
dddf85c
removed unused result variable to avoid compiler warnings
martinhanes Jan 27, 2019
d9c363c
Merge branch 'master' into my-master
martinhanes May 17, 2019
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17 changes: 14 additions & 3 deletions NDIR_I2C/NDIR_I2C.cpp
100644 → 100755
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Original file line number Diff line number Diff line change
Expand Up @@ -71,6 +71,10 @@ uint8_t NDIR_I2C::cmd_calibrateZero[9] = {0xFF,0x01,0x87,0x00,0x00,0x00
uint8_t NDIR_I2C::cmd_enableAutoCalibration[9] = {0xFF,0x01,0x79,0xA0,0x00,0x00,0x00,0x00,0xE6};
uint8_t NDIR_I2C::cmd_disableAutoCalibration[9] = {0xFF,0x01,0x79,0x00,0x00,0x00,0x00,0x00,0x86};

#define UNSET 254
uint8_t customSda = UNSET;
uint8_t customScl = UNSET;

NDIR_I2C::NDIR_I2C(uint8_t i2c_addr)
{
if (i2c_addr >= 8 && i2c_addr < 120) {
Expand All @@ -80,11 +84,20 @@ NDIR_I2C::NDIR_I2C(uint8_t i2c_addr)
}
}

void NDIR_I2C::setCustomWirePorts(uint8_t sda, uint8_t scl) {
customSda = sda;
customScl = scl;
}

uint8_t NDIR_I2C::begin()
{
if (i2c_addr) {
WIRE.begin();
if(customSda == UNSET || customScl == UNSET) {
WIRE.begin();
} else {
WIRE.begin(customSda, customScl);
}

write_register(IOCONTROL, 0x08);

if (write_register(FCR, 0x07)) {
Expand Down Expand Up @@ -258,7 +271,6 @@ uint8_t NDIR_I2C::receive(uint8_t *pbuf, uint8_t n) {

uint8_t NDIR_I2C::read_register(uint8_t reg_addr, uint8_t *pval)
{
uint8_t result;

WIRE.beginTransmission(i2c_addr);
WIRE.write(reg_addr << 3);
Expand All @@ -278,7 +290,6 @@ uint8_t NDIR_I2C::read_register(uint8_t reg_addr, uint8_t *pval)

uint8_t NDIR_I2C::write_register(uint8_t reg_addr, uint8_t *pdata, uint8_t n)
{
uint8_t result;

WIRE.beginTransmission(i2c_addr);
WIRE.write(reg_addr << 3);
Expand Down
1 change: 1 addition & 0 deletions NDIR_I2C/NDIR_I2C.h
100644 → 100755
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,7 @@ class NDIR_I2C {
uint32_t ppm;

uint8_t begin();
void setCustomWirePorts(uint8_t sda, uint8_t scl);
uint8_t measure();
uint8_t reset();
void calibrateZero();
Expand Down
3 changes: 3 additions & 0 deletions NDIR_I2C/examples/ReadConcentration/ReadConcentration.ino
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,9 @@ void setup()
{
Serial.begin(9600);

//if working with esp-based boards, set which pins you're using (in this case SDA is D2, SCL is D3)
//mySensor.setCustomWirePins(D2, D3);

if (mySensor.begin()) {
Serial.println("Wait 10 seconds for sensor initialization...");
delay(10000);
Expand Down