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| /*************************************
EMETTEUR
************************************/
/***************************************
carte TTGO LoRa32-OLED V1
/----------------\
|19 18|
|20 17|
|21 16|
|22 15|
|23 14|
|24 13|
|25 12|
|26 11|
|27 10| GPIO35 vbatPin
MISO GPIO19 |28 9| GPIO32 volet
|29 8| GPI033 Porte
SS GPIO18 |30 7|
SCK GPIO05 |31 6| GPIO26 DI0
I2C_SCL GPIO15 |32 5| GPIO27 MOSI
|33 4| GPIO14 RST
I2C_SDA GPIO04 |34 3|
|35 2|
OLED_RST GPIO16 |36 1|
-----------------
*************************************/
#include <driver/rtc_io.h>
#include <LoRa.h>
#include <SPI.h>
//Libraries for OLED Display
#include "SSD1306Wire.h" // legacy: #include "SSD1306.h"
// pins from https://randomnerdtutorials.com/ttgo-lora32-sx1276-arduino-ide/
// LoRa definition
#define SCK 5 // GPIO5 -- SX1278's SCK
#define MISO 19 // GPIO19 -- SX1278's MISO
#define MOSI 27 // GPIO27 -- SX1278's MOSI
#define SS 18 // GPIO18 -- SX1278's CS
#define RST 14 // GPIO14 -- SX1278's RESET
#define DI0 26 // GPIO26 -- SX1278's IRQ(Interrupt Request)
#define BAND 866E6 //433E6 for Asia, 866E6 for Europe and 915E6 for North America
// OLED definition
#define I2C_SDA 4
#define I2C_SCL 15
#define OLED_RST 16
SSD1306Wire display(0x3c, I2C_SDA, I2C_SCL);
const gpio_num_t pinVolet = GPIO_NUM_32; // RTC GPIO for ESP32: 0, 2, 4, 12-15, 25-27, 32-39;
const gpio_num_t pinPorte = GPIO_NUM_33;
const gpio_num_t vbatPin = GPIO_NUM_35;
#define BUTTON_PIN_BITMASK (1ull << pinVolet) | (1ull << pinPorte) //
const uint64_t uS_TO_S_FACTOR = 1000000ull; /* Conversion factor for micro seconds to seconds */
const uint64_t TIME_TO_SLEEP = 30ull; /* Time ESP32 will go to sleep (in seconds) */
RTC_DATA_ATTR int bootCount = 0;
//***********************************************
void loraMessage(const char * message) {
LoRa.beginPacket();
LoRa.println(message);
LoRa.endPacket();
}
//***********************************************
void envoiVbatBrut() {
const int tailleMax = 20; // y compris le '\0' de fin
static char vBatMessage[tailleMax]; // doit être assez grand pour contenir le message
int vBat = analogRead(vbatPin); // tension échantillonnée brute
Serial.print("Valeur Brute = "); Serial.println(vBat);
int n = snprintf(vBatMessage, sizeof vBatMessage, "V%d", vBat); // 'V' suivi de la tension échantillonnée brute
if ((n > 0) && (n < tailleMax)) // si on a pu écrire correctement le message
loraMessage(vBatMessage); // alors envoi du message
}
//***********************************************
void action() {
esp_sleep_wakeup_cause_t source_reveil = esp_sleep_get_wakeup_cause();
uint64_t GPIO_reason = esp_sleep_get_ext1_wakeup_status();
switch (source_reveil) {
case ESP_SLEEP_WAKEUP_TIMER :
Serial.println("Réveil par un timer");
envoiVbatBrut();
break;
default :
Serial.print("Réveil pas causé par le Deep Sleep :");
Serial.println(source_reveil);
break;
}
if (GPIO_reason != 0) {
const uint64_t gpioWakeUp = __builtin_ctzll(GPIO_reason); // __builtin_ctzll finds the position of the rightmost 1
switch (gpioWakeUp) {
case pinVolet: loraMessage("1"); break;
case pinPorte: loraMessage("2"); break;
default : Serial.println("Aucun GPIO connu n'a déclenché le réveil"); break;
}
}
}
//***********************************************
void setup() {
Serial.begin(115200);
while (!Serial) yield();
SPI.begin(SCK, MISO, MOSI, SS);
LoRa.setPins(SS, RST, DI0);
Serial.println("LoRa : Emetteur");
if (!LoRa.begin(BAND)) { // LoRa_frequency
Serial.println("Le lancement de LoRa a échoué !");
while (true) yield();
}
Serial.println("init ok");
display.init();
display.flipScreenVertically();
display.setFont(ArialMT_Plain_10);
display.setTextAlignment(TEXT_ALIGN_CENTER);
display.drawString(64, 22, "Emetteur: OK");
display.display();
delay(100);
display.clear();
display.display();
//Increment boot number and print it every reboot
++bootCount;
Serial.print("Boot number: "); Serial.println(bootCount);
action();
// go back to sleep
LoRa.end();
esp_sleep_enable_ext1_wakeup(BUTTON_PIN_BITMASK, ESP_EXT1_WAKEUP_ANY_HIGH);
esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR);
esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_AUTO);
rtc_gpio_pullup_en(pinVolet); //https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/sleep_modes.html#external-wakeup-ext1
rtc_gpio_pullup_en(pinPorte);
rtc_gpio_pulldown_dis(pinVolet);
rtc_gpio_pulldown_dis(pinPorte);
Serial.println("Going to sleep");
Serial.flush(); // just for peace of mind, as esp_deep_sleep_start() will flush the contents of UART FIFOs
esp_deep_sleep_start();
}
void loop() {} |
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