chris/NightscoutEInkClient
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Implement EPD deep sleep; Render battery voltage on screen

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This commit is contained in:
chrispr
2022-02-12 20:03:54 -05:00
parent 1459ccc4af
commit c38b6e56de
1 changed files with 39 additions and 2 deletions
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41
NightscoutEInkClient.ino
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@@ -3,6 +3,7 @@
#include <WiFi.h> #include <WiFi.h>
#include <HTTPClient.h> #include <HTTPClient.h>
#include <time.h> #include <time.h>
#include "esp_sleep.h"
//PIN LAYOUTS //PIN LAYOUTS
#define SRAM_CS 32 #define SRAM_CS 32
@@ -10,8 +11,9 @@
#define EPD_DC 33 #define EPD_DC 33
#define EPD_RESET -1 // can set to -1 and share with microcontroller Reset! #define EPD_RESET -1 // can set to -1 and share with microcontroller Reset!
#define EPD_BUSY 27 // can set to -1 to not use a pin (will wait a fixed delay) #define EPD_BUSY 27 // can set to -1 to not use a pin (will wait a fixed delay)
#define EPD_ENABLE 12
#define BATTERY_PIN A13
ThinkInk_290_Tricolor_Z10 display(EPD_DC, EPD_RESET, EPD_CS, SRAM_CS, EPD_BUSY); ThinkInk_290_Tricolor_Z10 display(EPD_DC, EPD_RESET, EPD_CS, SRAM_CS, EPD_BUSY);
#define COLOR0 EPD_WHITE #define COLOR0 EPD_WHITE
@@ -37,6 +39,10 @@ void setup() {
while (!Serial) { delay(10); } while (!Serial) { delay(10); }
Serial.println("Nightscout CGM BS Monitor starting..."); Serial.println("Nightscout CGM BS Monitor starting...");
//turn EPD on
pinMode(EPD_ENABLE, OUTPUT);
digitalWrite(EPD_ENABLE, HIGH);
ConnectToWifi(); ConnectToWifi();
String nightscoutResponse = httpGETRequest(nightscoutUrl); String nightscoutResponse = httpGETRequest(nightscoutUrl);
Serial.println(nightscoutResponse); Serial.println(nightscoutResponse);
@@ -57,6 +63,7 @@ void setup() {
RenderGraph(array); RenderGraph(array);
RenderRightPane(array[0]); RenderRightPane(array[0]);
RenderBatteryPercentage();
display.display(); display.display();
@@ -101,6 +108,7 @@ void SleepWithTimeSync(int lastReadingInSeconds) {
secondsToSleep = secondsToSleep + 7; secondsToSleep = secondsToSleep + 7;
esp_sleep_enable_timer_wakeup(secondsToSleep * uS_TO_S_FACTOR); esp_sleep_enable_timer_wakeup(secondsToSleep * uS_TO_S_FACTOR);
Serial.flush(); Serial.flush();
TurnOffEPD();
esp_deep_sleep_start(); esp_deep_sleep_start();
} }
else { else {
@@ -109,9 +117,38 @@ void SleepWithTimeSync(int lastReadingInSeconds) {
} }
void RenderBatteryPercentage() {
int batteryPinInput = analogRead(BATTERY_PIN);
Serial.printf("raw adc value %d", batteryPinInput);
//Vin = 3.3(read/4098)
float batteryVoltage = 3.3 * (float(batteryPinInput) / 4098.0);
//ESP32 A13 returns half the voltage, so double this reading
batteryVoltage = batteryVoltage * 2.0;
Serial.print("calc. voltage ");
Serial.println(batteryVoltage);
//Render on screen
display.setCursor(245, 110);
display.setTextSize(2);
if(batteryVoltage < 3.6)
display.setTextColor(COLOR2);
else
display.setTextColor(COLOR1);
display.print(batteryVoltage);
display.print("v");
}
void TurnOffEPD() {
digitalWrite(EPD_ENABLE, LOW);
delay(1000);
gpio_hold_en(GPIO_NUM_12);
gpio_deep_sleep_hold_en();
}
void SleepFiveMins() { void SleepFiveMins() {
esp_sleep_enable_timer_wakeup(285 * uS_TO_S_FACTOR); esp_sleep_enable_timer_wakeup(285 * uS_TO_S_FACTOR);
Serial.flush(); Serial.flush();
TurnOffEPD();
esp_deep_sleep_start(); esp_deep_sleep_start();
} }