ESP8266 Community Forum

- Sat Apr 18, 2015 10:24 am #14910 yes i found out eventually that you don't need to see esptool as a programmer, this really should be in big bold letters on the download page, would have saved me hours or messing around.

- Sun May 03, 2015 10:13 am #16352 HI,

after read all this, I still have a problem to upload the sketch.
Compilation is fine, but if I do not select any programmer I get an error requesting a programer.
Then I tried each one of the Arduino provided programmer, I get the follwoing error:
java.lang.NullPointerException
at cc.arduino.packages.uploaders.SerialUploader.uploadUsingProgrammer(SerialUploader.java:252)
at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:78)
at processing.app.debug.Compiler.upload(Compiler.java:165)
at processing.app.Sketch.upload(Sketch.java:1260)
at processing.app.Sketch.exportApplet(Sketch.java:1202)
at processing.app.Sketch.exportApplet(Sketch.java:1174)
at processing.app.Editor$DefaultExportAppHandler.run(Editor.java:2513)
at java.lang.Thread.run(Thread.java:745)
My system:
- Windows 8.1 Pro
- Arduino 1.6.3 installed from scratch

I noticed the file "C:\Users\xxx\Documents\Arduino\hardware\esp8266com\esp8266\programmers.txt has zero bytes.

Any help is highly welcome.
KurtB

- Sun May 03, 2015 10:34 am #16355 Hi,
sorry, I found out I have to use "upload" instead of "upload with programmer" as I did before.
Problem solved.
KurtB

- Sat Jul 11, 2015 4:21 am #22994

Can't see esptool

Any advice?

Thanks in advance.

I am solve with copy folders "arduino/hardware/esp8266com" and "arduino/hardware/tools/esp8266" from parent version in same path.