Could you please bump the version in library.properties, and release a new version, so that the Arduino IDE library manager will enable users to get the latest code with the committed bug fixes?

• Board: Adafruit Feather M4
• Plaftformio with RTClib
• Issue: the library is giving a compile error
  .pio\libdeps\adafruit_feather_m4\TinyWireM_ID797\USI_TWI_Master.cpp:23:10: fatal error: util/delay.h: No such file or directory #include <util/delay.h> ^~~~~~~~~~~~~~
  I have tried the usual suspects but cant figure it out. compiles fine in arduino ide though.

• Arduino board: Digispark

• Arduino IDE version: 1.8.5

• Steps to reproduce the problem:

-- Ensure a basic sketch works with the uC. DONE.

-- Install Adafruit PWM Servo Driver Library for Digispark, Branch: TinyWireM, by placing the uncompressed folder called "Adafruit_PWMServoDriver" into Documents\Arduino\libraries, per instructions at above link. DONE.

-- Load File menu > Examples > Adafruit_PWMServoDriver > pwmtest. DONE.

-- Compile, and receive error:

Adafruit_PWMServoDriver.cpp:63:20: error: call of overloaded 'send(uint16_t&)' is ambiguous

TinyWireM.send(on);

                ^

D:\Documents\Arduino\libraries\Adafruit_PWMServoDriver\Adafruit_PWMServoDriver.cpp:63:20: note: candidates are:

In file included from D:\Documents\Arduino\libraries\Adafruit_PWMServoDriver\Adafruit_PWMServoDriver.cpp:19:0:

C:\Users\Baby Burrito\AppData\Local\Arduino15\packages\digistump\hardware\avr\1.6.7\libraries\TinyWireM/TinyWireM.h:65:10: note: void USI_TWI::send(uint8_t)

 void send(uint8_t b)               { write(b); }

      ^

C:\Users\Baby Burrito\AppData\Local\Arduino15\packages\digistump\hardware\avr\1.6.7\libraries\TinyWireM/TinyWireM.h:67:10: note: void USI_TWI::send(int)

 void send(int n)                   { write((uint8_t)n); }

      ^

I found the write() function always lost the last data.
USI_BufIdx is start from 0, so the expression for compare with USI_BUF_SIZE require minus 1:
if (USI_BufIdx >= USI_BUF_SIZE - 1) return 0; // dont blow out the buffer

Hello, I have been trying to use this library and I found a small issue. In the USI_TWI_Master.h, I found that the board definitions for the 2313/4313 fail to compile. I have made some changes to that file and now it compiles. I have not tested it as of 5/22/2017 yet but will do so in the future.

Line 92 contains: #if defined(AVR_AT90Tiny2313) | defined(AVR_ATtiny2313)
This is what it was before I changed it

Line 92 should contain: #if defined(AVR_ATtiny2313) | defined(AVR_ATtiny4313)
This is what I changed it to and the code will compile now.

This is Bit Or
#if defined(__AVR_AT90Mega169__) | defined(__AVR_ATmega169__) | \ defined(__AVR_AT90Mega165__) | defined(__AVR_ATmega165__) | \ defined(__AVR_ATmega325__) | defined(__AVR_ATmega3250__) | \ defined(__AVR_ATmega645__) | defined(__AVR_ATmega6450__) | \ defined(__AVR_ATmega329__) | defined(__AVR_ATmega3290__) | \ defined(__AVR_ATmega649__) | defined(__AVR_ATmega6490__)

This is Logical Or
#if defined(__AVR_AT90Mega169__) || defined(__AVR_ATmega169__) || \ defined(__AVR_AT90Mega165__) || defined(__AVR_ATmega165__) || \ defined(__AVR_ATmega325__) || defined(__AVR_ATmega3250__) || \ defined(__AVR_ATmega645__) || defined(__AVR_ATmega6450__) || \ defined(__AVR_ATmega329__) || defined(__AVR_ATmega3290__) || \ defined(__AVR_ATmega649__) || defined(__AVR_ATmega6490__)

Which is right?

The example does not work correctly at negative temperatures in DS1621.
To solve the problem, it is necessary to make a casting to char on line 98 for the value to be interpreted as negative.
The code below :

  tempC = (char)TinyWireM.receive();    // get the temperature

See the issue in the Adafruit boards repo for details:
adafruit/Adafruit_Arduino_Boards#13

Hi, this is more a question than an issue, sorry if there was another way to ask.
As the title suggest, is there a chance these newer processors will be supported, the biggest issue I see is lacking USI support.

In TinyWireM.cpp the function endTransmission() is not returning proper status.
This breaks code that checks for return status information using the endTransmission() function.
This:

uint8_t USI_TWI::endTransmission() {
  endTransmission(1);
}

Should be changed to:

uint8_t USI_TWI::endTransmission() {
  return(endTransmission(1));
}

• Arduino board: None -- raw ATTiny25

• Arduino IDE version (found in Arduino -> About Arduino menu): 1.8.3 (Windows Store 1.8.6.0)

-I'm using a Tiny25 to scan for an unknown number of I2C devices so I later can only send data to devices that I know exist. In doing this, I'm sending a known request for version info from the slave devices. The problem is if the device doesn't exist then TinyWireM.endTransmission() does not return the SCL line to high.

You can see the clock not returning to high here:

Close up of where the problem starts:

Data 0x14 is the reply from a device, address 0x11 is a non-existent possible device.

Snippet of the scanning code:
for (int a = 0x10; a < 0x18; a++) { TinyWireM.beginTransmission(a); TinyWireM.send(0x7F); TinyWireM.endTransmission(); if (TinyWireM.requestFrom(a, 1) > 0) { Addresses[AirChains++] = a; while(TinyWireM.available()) { TinyWireM.receive(); } } delayMicroseconds (50); }

• Arduino board: Arduino Mega

• Arduino IDE version 2.3.2

• List the steps to reproduce the problem below (if possible attach a sketch or
  copy the sketch code in too): LIST REPRO STEPS BELOW

Install library,

Navigate to File/Examples/TinyWireM/Tiny85Temp and click to open

See silent failure.

(See also arduino/arduino-ide#2377)

If a user includes TinyWireM.h in a sketch and builds for say an Uno board, they will get tons of errors.
They can easily be confused and not recognize the issue. (I have seen this first hand)
The current library.properties says the library works on any architecture.
The properties files should indicate that it is AVR only.
But even specifying that the library architecture is AVR only does not fully solve the issue.
So to fully remedy the issue, TinyWireM.h should also use conditionals to explicitly check the processor type being used and crash the compile with a meaningful error message when attempting to use it on an unsupported processor.

Even better would be to work with the Attiny core maintainer and get this library into to actual core so that it is only available when that tiny core type is being used.

This is a compatibility issue for devices such as the MMA8452 accelerometer. Any chance this could be added to the TinyWire library.

http://arduino.cc/en/Reference/WireEndTransmission

Hello there,

In the TInyWireM library, we got the SDA , SCL pins declared in the USI_TWI_Master.h file.
So can we change the pin declarations of the SDA ,SCL pins in the file and expect the library to work with the new pins declared?

Thanks in Advance