Can anyone point me to help for setting up OTA via WiFi with an "Arduino Uno R4 WiFi" board?  I can't use the Arduino cloud because the core libraries don't compile.  Even if I could, that is a very slow and cumbersome process that I'd rather avoid. 

I need to get OTA working with Visual Micro directly from Visual Studio so that I can use locally-patched libraries, and get the full benefit of vMicro, but I can't figure out how to set it up.  

I've updated my R4 with the latest firmware.

I'm trying to set up the OTA example that's shown on the "Uno R4 Wifi" 'Examples' menu.

It builds and runs, but I get this runtime error:

Port closed
Uploading to I/O board
Opening port
Port open
Please upgrade the firmware
Attempting to connect to SSID: SpectrumSetup-4B
SSID: SpectrumSetup-4B
IP Address: 192.168.1.247
signal strength (RSSI):-47 dBm
ota.begin() error: 
-26

Any help would be appreciated.

Thanks for the help!

First, a trivial matter:  to get the serial monitor to work, I had to do this to make Serial.printxx() calls work correctly and not "miss" any of the early ones in startup():

  //Serial.begin(9600);
  Serial.begin(115200);
  while (!Serial);
  delay(1000);  // Early prints don't show up without this delay 

However, I can't get the second update (the first OTA update) to work.

The build works, and the initial upload works, and then the TCP/IP port shows up as an option for the Board/Port selection in VS.  If I pick that, and attempt an update (I was asked for the password ('password') the very first time, but not on subsequent attempts [is it expected that I would not be asked again after the first time?]), I get this in the VS output window:


# Compute Size: 7-2017q4/bin/arm-none-eabi-size" -A _OTA.ino.elf"

Program WiFi101_OTA size: 76148 bytes (used 29% of a 262144 byte maximum) (2.57 secs)
Minimum Memory Usage: 10012 bytes (31% of a 32768 byte maximum)
 

TRIAL Version of Visual Micro (Expires On 26 April 2024)
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[code]Uploading 'WiFi101_OTA' to 'Arduino UNO R4 WiFi (unor4wifi)' using '192.168.1.247'
Uploader started for board Arduino UNO R4 WiFi (unor4wifi)
Upload method will be: bootloader
Uploading via Bootloader 
Port Properties (network)
     Name=Arduino
     HostName=Arduino
     Address=192.168.1.247
     port=65280
     Protocol=Any
     ssh_upload=no
     tcp_check=no
     auth_upload=yes
     board=arduino
     password=password
{runtime.tools.arduinoOTA.path}\bin\arduinoOTA -address 192.168.1.247 -port 65280 -username arduino -password "password" -sketch _OTA.ino.bin" -upload /sketch -b

The system cannot find the file specified


Any idea what's up here?

The error you are seeing with the upload is due to the ArduinoOTA tools being missing from your machine.

These are installed as part of a number of board packages such as the Arduino AVR, or Arduino SAMD board package.

If you install one of these board packages, and restart VS it should then be able to use the tool for the upload, if it fails can you attach a fresh build log with the options shown at the top of the page.

Once we have reviewed this area fully we will update this thread again.

Thanks for the update, and believe there could be a few reasons for the failure of the main sketch to update.

1) Timeout:   
The ArduinoOTA tool I believe will timeout after 10s, however the timeout parameter was only added in a recent version of the tool:
https://github.com/arduino/arduinoOTA/releases/tag/1.4.0

If this (or later) version of the ArduinoOTA tool is downloaded and manually installed over the existing one: %LOCALAPPDATA%\Arduino15\packages\arduino\tools\arduinoOTA\1.3.0\bin\arduinoOTA

And the platform.local.txt file is amended for the below patterns to add the "-t 100" for a 100s timeout:
tools.arduino_ota.upload.pattern
tools.arduinoOTA.program.pattern

Then this should give the uploader longer to do the update before it believes it has failed.  The upload command can be copied from the output window and run via the command line for simpler testing where needed.

2) Sketch Size: 
Normally with OTA updates you have a little under half of the flash size available for your sketch.  This is due to it needing to store the new sketch before restarting, and your log shows it is 53% so it may be slightly too large.  The optimization can be overridden however it may result in a larger compiled sketch even when it is increased (currently it is optimized for size with the -Os flag in the compiler recipes).

Hopefully the Timeout changes above help.