Iam Using ESP32 with DHT11 and a SPI 0.96" OLED display for a Temperature monitoring system. This all are powered using 500mah Lipo battery. at every 5 minutes, ESP will connect to Wi-Fi and send Temperature data to a mysql data base hosted on a web server. In between this read cycle, ESP will be in Deep Sleep mode in order to save battery life. Now During the sleep mode, my Display will also went OFF.
Is there any possibility to retain the last displayed screen on OLED during ESP's sleep and get refreshed with new data after next wakeup?
OLED power is directly given from the battery and Adafruit_SSD1306 Library used.