Nano 33 IOT and keyboard library

UKHeliBob · August 18, 2021, 11:45am

The Nano 33 IOT appears not to work with the Keyboard library. For instance

#include <Keyboard.h>

void setup()
{
  Serial.begin(115200);
  while (!Serial);
  Serial.println("Nano 33 IOT");
  Keyboard.begin();
  pinMode(2, INPUT_PULLUP);
  while (digitalRead(2) == HIGH);
  Serial.println("output to Serial");
  Keyboard.println("output to PC application");
}

void loop()
{
}

produces no keyboard output, only Serial

Something funny is going on with USB ports. Reading around the problem it seems that there was something wrong with the board drivers when used in conjunction with the Keyboard library

My current situation is that Windows Device Manager shows one port for the Nano 33 IOT after uploading the sketch above

but I am not sure that is right. Uploading the Bare Minimum sketch produces a different result

I have version 1.8.11 of the board files installed for the Nano 33 IOT, which seems to be latest

All suggestions for fixes to this problem will be gratefully received
@pert

in0 · August 18, 2021, 2:12pm

I will guess it's this issue:

github.com/arduino/ArduinoCore-samd

Keyboard and Mouse not working from 1.8.0 release on

opened 10:25AM - 26 Jun 19 UTC

per1234

Windows 10 64 bit / Ubuntu 19.04 / Raspbian 9.4 Keyboard library 1.0.2 / Mouse …library 1.0.1 MKR1000, MKR Fox 1200, MKR GSM 1400 When compiled with Arduino SAMD Boards 1.8.0, 1.8.1, or https://github.com/arduino/ArduinoCore-samd/tree/284bc5a3185756cf6d107c002cc8841d772d07d4 installed, the following code: ```c++ #include <Keyboard.h> void setup() { pinMode(2, INPUT_PULLUP); pinMode(LED_BUILTIN, OUTPUT); Keyboard.begin(); } void loop() { if (digitalRead(2) == LOW) { Keyboard.print("hello"); digitalWrite(LED_BUILTIN, HIGH); delay(500); digitalWrite(LED_BUILTIN, LOW); delay(500); } } ``` has no effect on Windows and gives this sort of incorrect output on my Linux machines: ``` heloooooooooooohelohelohelooooooooooooheloooooooooooohelheloheloooooooooooohelooooooooooooheloooooooooooohhelooooooooooooheloooooooooooohelooooooooooooheloooooooooooohelheloooooooooooohelohhelohelhhhelhelohhe ``` The following code ```c++ #include <Mouse.h> void setup() { pinMode(2, INPUT_PULLUP); pinMode(LED_BUILTIN, OUTPUT); Mouse.begin(); } void loop() { if (digitalRead(2) == LOW) { Mouse.move(0, 200); digitalWrite(LED_BUILTIN, HIGH); delay(1000); Mouse.move(0, -200); digitalWrite(LED_BUILTIN, LOW); delay(1000); } } ``` Has no effect on Windows, but seems to work correctly on Linux. When compiled with Arduino SAMD Boards 1.6.28 or 1.6.21, both sketches work as expected on Windows and Linux.

(it only mentions the MKR boards, but the same applies just as well for Nano 33 IoT)

Try this fix:
https://github.com/arduino/ArduinoCore-samd/issues/423#issuecomment-615093627

a solution is to open Device Manager and uninstall the MKR1000 drivers; after reset, both serial and HID (keyboard) drivers should be automatically installed

Specific instructions:

Right click the device in Device Manager for your board.
Check the box next to "[] Delete the driver software for this device".
Click the Uninstall button.
Press and release the reset button on the board. The board should now automatically reinstall.

UKHeliBob · August 18, 2021, 2:31pm

Thanks for the reply.

I went through the process of uninstalling and deleting the drivers for an entry with the yellow triangle so I believe that the Windows drivers are being used and there is now only one entry for the Nano in Device Manager

The driver being used is as follows

Checking for updated drivers results in Windows reporting the following

Searching Windows Update finds no newer/better drivers

I cannot delete the current driver using Device Manager as there is no option to do so on the right click menu, presumably because it is a Microsoft driver rather than a third party one

I can find very little information on this problem on line and so far, no solution

system · December 16, 2021, 2:32pm

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