forked from esphome/esphome
/
bh1750.cpp
89 lines (75 loc) · 2.43 KB
/
bh1750.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
#include "bh1750.h"
#include "esphome/core/log.h"
namespace esphome {
namespace bh1750 {
static const char *TAG = "bh1750.sensor";
static const uint8_t BH1750_COMMAND_POWER_ON = 0b00000001;
static const uint8_t BH1750_COMMAND_MT_REG_HI = 0b01000000; // last 3 bits
static const uint8_t BH1750_COMMAND_MT_REG_LO = 0b01100000; // last 5 bits
void BH1750Sensor::setup() {
ESP_LOGCONFIG(TAG, "Setting up BH1750 '%s'...", this->name_.c_str());
if (!this->write_bytes(BH1750_COMMAND_POWER_ON, nullptr, 0)) {
this->mark_failed();
return;
}
uint8_t mtreg_hi = (this->measurement_time_ >> 5) & 0b111;
uint8_t mtreg_lo = (this->measurement_time_ >> 0) & 0b11111;
this->write_bytes(BH1750_COMMAND_MT_REG_HI | mtreg_hi, nullptr, 0);
this->write_bytes(BH1750_COMMAND_MT_REG_LO | mtreg_lo, nullptr, 0);
}
void BH1750Sensor::dump_config() {
LOG_SENSOR("", "BH1750", this);
LOG_I2C_DEVICE(this);
if (this->is_failed()) {
ESP_LOGE(TAG, "Communication with BH1750 failed!");
}
const char *resolution_s;
switch (this->resolution_) {
case BH1750_RESOLUTION_0P5_LX:
resolution_s = "0.5";
break;
case BH1750_RESOLUTION_1P0_LX:
resolution_s = "1";
break;
case BH1750_RESOLUTION_4P0_LX:
resolution_s = "4";
break;
default:
resolution_s = "Unknown";
break;
}
ESP_LOGCONFIG(TAG, " Resolution: %s", resolution_s);
LOG_UPDATE_INTERVAL(this);
}
void BH1750Sensor::update() {
if (!this->write_bytes(this->resolution_, nullptr, 0))
return;
uint32_t wait = 0;
// use max conversion times
switch (this->resolution_) {
case BH1750_RESOLUTION_0P5_LX:
case BH1750_RESOLUTION_1P0_LX:
wait = 180;
break;
case BH1750_RESOLUTION_4P0_LX:
wait = 24;
break;
}
this->set_timeout("illuminance", wait, [this]() { this->read_data_(); });
}
float BH1750Sensor::get_setup_priority() const { return setup_priority::DATA; }
void BH1750Sensor::read_data_() {
uint16_t raw_value;
if (!this->parent_->raw_receive_16(this->address_, &raw_value, 1)) {
this->status_set_warning();
return;
}
float lx = float(raw_value) / 1.2f;
lx *= 69.0f / this->measurement_time_;
ESP_LOGD(TAG, "'%s': Got illuminance=%.1flx", this->get_name().c_str(), lx);
this->publish_state(lx);
this->status_clear_warning();
}
void BH1750Sensor::set_resolution(BH1750Resolution resolution) { this->resolution_ = resolution; }
} // namespace bh1750
} // namespace esphome