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Merge pull request #4907 from llagendijk/development

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Add support for MAX44009 ambient light sensor
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Theo Arends 2019-01-24 11:21:40 +01:00 committed by GitHub
commit 669f6c86c9
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2 changed files with 181 additions and 1 deletions
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2
sonoff/my_user_config.h
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@ -328,6 +328,7 @@
// #define USE_PN532_I2C // Enable PN532 - Near Field Communication (NFC) controller (+1k7 code, 164 bytes of mem)
// #define USE_PN532_DATA_FUNCTION // Enable PN532 DATA Usage using Sensor15 command (+1k6 code, 316 bytes of mem)
// #define USE_PN532_CAUSE_EVENTS // Enable PN532 driver to cause event's on card read in addition to immediate telemetry (+64 bytes code, 48 bytes mem)
// #define USE_MAX44009 // Enable MAX44009 Ambient Light sensor (I2C addresses 0x4A and 0x4B) (+0k8 code)
// #define USE_DISPLAY // Add I2C Display Support (+2k code)
#define USE_DISPLAY_MODES1TO5 // Enable display mode 1 to 5 in addition to mode 0
@ -342,7 +343,6 @@
#define MTX_ADDRESS6 0x76 // [DisplayAddress6] I2C address of sixth 8x8 matrix module
#define MTX_ADDRESS7 0x00 // [DisplayAddress7] I2C address of seventh 8x8 matrix module
#define MTX_ADDRESS8 0x00 // [DisplayAddress8] I2C address of eigth 8x8 matrix module
#endif // USE_I2C
// -- SPI sensors ---------------------------------

180
sonoff/xsns_91_max44009.ino Normal file
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@ -0,0 +1,180 @@
/*
xsns_91_max44009.ino - MAX44009 ambient light sensor support for Sonoff-Tasmota
Copyright (C) 2019 Theo Arends
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef USE_I2C
#ifdef USE_MAX44009
/*********************************************************************************************\
* MAX44009 - Ambient Light Intensity
*
* I2C Address: 0x4a or 0x4b
\*********************************************************************************************/
#define XSNS_91 91
#define MAX44009_ADDR1 0x4A
#define MAX44009_ADDR2 0x4B
#define MAX44009_NO_REGISTERS 8
#define REG_CONFIG 0x02
#define REG_LUMINANCE 0x03
#define REG_LOWER_THRESHOLD 0x06
#define REG_THRESHOLD_TIMER 0x07
#define MAX44009_CONTINUOUS_AUTO_MODE 0x80 // Start measurement in automatic, continous mode
uint8_t max44009_address;
uint8_t max44009_addresses[] = { MAX44009_ADDR1, MAX44009_ADDR2, 0 }; //0 terminated list
uint8_t max44009_found = 0;
uint8_t max44009_valid = 0;
float max44009_illuminance = 0;
char max44009_types[] = "MAX44009";
bool Max4409Read_lum(void)
{
max44009_valid = 0;
uint8_t regdata[2];
/* Read 2 bytes luminance */
if (I2cValidRead16((uint16_t *)&regdata, max44009_address, REG_LUMINANCE)) {
int exponent = (regdata[0] & 0xF0) >> 4;
int mantissa = ((regdata[0] & 0x0F) << 4) | (regdata[1] & 0x0F);
max44009_illuminance = (float)(((0x00000001 << exponent) * (float)mantissa) * 0.045);
max44009_valid = 1;
return true;
} else {
return false;
}
}
/********************************************************************************************/
void Max4409Detect(void)
{
byte reg[8];
bool failed = false;
if (max44009_found) {
return;
}
uint8_t buffer1;
uint8_t buffer2;
for (byte i = 0; 0 != max44009_addresses[i]; i++) {
max44009_address = max44009_addresses[i];
if ((I2cValidRead8(&buffer1, max44009_address, REG_LOWER_THRESHOLD)) &&
(I2cValidRead8(&buffer2, max44009_address, REG_THRESHOLD_TIMER))) {
//snprintf(log_data, sizeof(log_data), "MAX44009 %x: %x, %x", max44009_address, (int)buffer1, (int)buffer2);
//AddLog(LOG_LEVEL_DEBUG_MORE);
if ((0x00 == buffer1) &&
(0xFF == buffer2)) {
// looks like a MAX44009, try to initialize
Wire.beginTransmission(max44009_address);
// select configuration register and set mode
Wire.write(REG_CONFIG);
Wire.write(MAX44009_CONTINUOUS_AUTO_MODE);
if (0 == Wire.endTransmission()) {
max44009_found = 1;
snprintf_P(log_data, sizeof(log_data), S_LOG_I2C_FOUND_AT, max44009_types, max44009_address);
AddLog(LOG_LEVEL_DEBUG);
break;
}
}
}
}
}
void Max4409EverySecond(void)
{
if (max44009_found) {
Max4409Read_lum();
}
}
void Max4409Show(boolean json)
{
char illum_str[8];
if (max44009_valid) {
/* convert illuminance to string with suitable accuracy */
uint8_t prec = 0;
if (10 > max44009_illuminance ) {
prec = 3;
} else if (100 > max44009_illuminance) {
prec = 2;
} else if (1000 > max44009_illuminance) {
prec = 1;
}
dtostrf(max44009_illuminance, sizeof(illum_str) -1, prec, illum_str);
if (json) {
snprintf_P(mqtt_data, sizeof(mqtt_data),
PSTR("%s,\"%s\":{\"" D_JSON_ILLUMINANCE "\":%s}"),
mqtt_data, max44009_types, illum_str);
#ifdef USE_DOMOTICZ
if (0 == tele_period) {
DomoticzSensor(DZ_ILLUMINANCE, illum_str);
}
#endif // USE_DOMOTICZ
#ifdef USE_WEBSERVER
} else {
// show integer value for lx on web-server
snprintf_P(mqtt_data, sizeof(mqtt_data), HTTP_SNS_ILLUMINANCE,
mqtt_data, max44009_types, (int)max44009_illuminance);
#endif // USE_WEBSERVER
}
}
}
/*********************************************************************************************\
* Interface
\*********************************************************************************************/
boolean Xsns91(byte function)
{
boolean result = false;
if (i2c_flg) {
switch (function) {
case FUNC_INIT:
Max4409Detect();
break;
case FUNC_EVERY_SECOND:
Max4409EverySecond();
break;
case FUNC_JSON_APPEND:
Max4409Show(1);
break;
#ifdef USE_WEBSERVER
case FUNC_WEB_APPEND:
Max4409Show(0);
break;
#endif // USE_WEBSERVER
}
}
return result;
}
#endif // USE_MAX44009
#endif // USE_I2C