ESP8266/OTA: Difference between revisions

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Revision as of 18:14, 10 November 2015

Exploring Over The Air (OTA) updates.

https://harizanov.com/2015/06/firmware-over-the-air-fota-for-esp8266-soc/

There is an OTA option in the Arduino IDE.

UPDATED

This now actually works with Arduino IDE 1.6.5 r5

Freshly updated documentation

https://github.com/esp8266/Arduino/blob/master/doc/ota_updates.md

Verified this working with DNS_SD_Arduino_OTA Example sketch using ESP-12e with 1MB memory. DOES NOT work with ESP-01 with 512KB memory.

It's also important to know the flash memory size, ESP.getFreeSketchSpace() may be useful, free space must be greater than sketch size.

void setup() {
  Serial.begin(115200);
  Serial.println("Flash Memory Stuff");

  Serial.println("ESP ID: ");
  Serial.println(ESP.getChipId(), HEX);
 
  Serial.println("Flash ID: ");
  Serial.println(ESP.getFlashChipId(), HEX);
  Serial.println("Flash Size: ");

  Serial.printf("Sketch size: %u\n", ESP.getSketchSize());
  Serial.printf("Free size: %u\n", ESP.getFreeSketchSpace());
}

Serial output from an ESP-01

ESP ID: 
DCED75
Flash ID: 
1440E0
Sketch size: 304716
Free size: 655360

Note: Updated to HEX formatting of Flash ID.

@@ Line 3: / Line 3: @@
 * https://harizanov.com/2015/06/firmware-over-the-air-fota-for-esp8266-soc/
-There is an OTA option in the Arduino IDE, however there doesn't seem to be much on how to use it.
+There is an OTA option in the Arduino IDE.
 <span style="color:#ff6600;font-family:courier;font-size:24pt">'''UPDATED'''</span>
-This now potentially actually works with Arduino IDE 1.6.5 r5
+This now actually works with Arduino IDE 1.6.5 r5
-In processes documentation
+Freshly updated documentation
 * https://github.com/esp8266/Arduino/blob/master/doc/ota_updates.md
-* https://github.com/esp8266/Arduino/blob/master/libraries/ESP8266mDNS/examples/OTA-mDNS-SPIFFS/OTA-mDNS-SPIFFS.ino
+Verified this working with DNS_SD_Arduino_OTA Example sketch using ESP-12e with 1MB memory. DOES NOT work with ESP-01 with 512KB memory.
-It's also important to know the flash memory size, ESP.getFlashChipSize() may be useful.
+It's also important to know the flash memory size, ESP.getFreeSketchSpace() may be useful, free space must be greater than sketch size.
 <pre>
@@ Line 29: / Line 29: @@
    Serial.println(ESP.getFlashChipId(), HEX);
    Serial.println("Flash Size: ");
-   Serial.println(ESP.getFlashChipSize());
-   Serial.println("Flash Speed: ");
+   Serial.printf("Sketch size: %u\n", ESP.getSketchSize());
-  Serial.println(ESP.getFlashChipSpeed());
+   Serial.printf("Free size: %u\n", ESP.getFreeSketchSpace());
 }
@@ Line 42: / Line 42: @@
 Flash ID:
 E0
-Flash Size:
+Sketch size: 304716
-4194304
+Free size: 655360
-Flash Speed:
-40000000
 </pre>
-''Note: Updated to HEX formatting of numbers. Flash Size returned seems to be whatever option you have set in the IDE, and may not reference the actual hardware size.
+''Note: Updated to HEX formatting of Flash ID.

ESP8266/OTA: Difference between revisions

Revision as of 18:14, 10 November 2015

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