diff --git a/plugins/Kaleidoscope-Hardware-Keyboardio-Atreus/library.properties b/plugins/Kaleidoscope-Hardware-Keyboardio-Atreus/library.properties
new file mode 100644
index 00000000..e7baffc6
--- /dev/null
+++ b/plugins/Kaleidoscope-Hardware-Keyboardio-Atreus/library.properties
@@ -0,0 +1,2 @@
+name=Kaleidoscope-Hardware-Keyboardio-Atreus
+version=0.0.0
diff --git a/src/Kaleidoscope-Hardware-Keyboardio-Atreus.h b/plugins/Kaleidoscope-Hardware-Keyboardio-Atreus/src/Kaleidoscope-Hardware-Keyboardio-Atreus.h
similarity index 100%
rename from src/Kaleidoscope-Hardware-Keyboardio-Atreus.h
rename to plugins/Kaleidoscope-Hardware-Keyboardio-Atreus/src/Kaleidoscope-Hardware-Keyboardio-Atreus.h
diff --git a/src/kaleidoscope/device/keyboardio/Atreus2.cpp b/plugins/Kaleidoscope-Hardware-Keyboardio-Atreus/src/kaleidoscope/device/keyboardio/Atreus2.cpp
similarity index 100%
rename from src/kaleidoscope/device/keyboardio/Atreus2.cpp
rename to plugins/Kaleidoscope-Hardware-Keyboardio-Atreus/src/kaleidoscope/device/keyboardio/Atreus2.cpp
diff --git a/src/kaleidoscope/device/keyboardio/Atreus2.h b/plugins/Kaleidoscope-Hardware-Keyboardio-Atreus/src/kaleidoscope/device/keyboardio/Atreus2.h
similarity index 100%
rename from src/kaleidoscope/device/keyboardio/Atreus2.h
rename to plugins/Kaleidoscope-Hardware-Keyboardio-Atreus/src/kaleidoscope/device/keyboardio/Atreus2.h
diff --git a/plugins/Kaleidoscope-Hardware-Keyboardio-Imago/library.properties b/plugins/Kaleidoscope-Hardware-Keyboardio-Imago/library.properties
new file mode 100644
index 00000000..6c8b11b3
--- /dev/null
+++ b/plugins/Kaleidoscope-Hardware-Keyboardio-Imago/library.properties
@@ -0,0 +1,2 @@
+name=Kaleidoscope-Hardware-Keyboardio-Imago
+version=0.0.0
diff --git a/src/Kaleidoscope-Hardware-Keyboardio-Imago.h b/plugins/Kaleidoscope-Hardware-Keyboardio-Imago/src/Kaleidoscope-Hardware-Keyboardio-Imago.h
similarity index 100%
rename from src/Kaleidoscope-Hardware-Keyboardio-Imago.h
rename to plugins/Kaleidoscope-Hardware-Keyboardio-Imago/src/Kaleidoscope-Hardware-Keyboardio-Imago.h
diff --git a/src/kaleidoscope/device/keyboardio/Imago.cpp b/plugins/Kaleidoscope-Hardware-Keyboardio-Imago/src/kaleidoscope/device/keyboardio/Imago.cpp
similarity index 100%
rename from src/kaleidoscope/device/keyboardio/Imago.cpp
rename to plugins/Kaleidoscope-Hardware-Keyboardio-Imago/src/kaleidoscope/device/keyboardio/Imago.cpp
diff --git a/src/kaleidoscope/device/keyboardio/Imago.h b/plugins/Kaleidoscope-Hardware-Keyboardio-Imago/src/kaleidoscope/device/keyboardio/Imago.h
similarity index 100%
rename from src/kaleidoscope/device/keyboardio/Imago.h
rename to plugins/Kaleidoscope-Hardware-Keyboardio-Imago/src/kaleidoscope/device/keyboardio/Imago.h
diff --git a/src/kaleidoscope/device/keyboardio/twi.c b/plugins/Kaleidoscope-Hardware-Keyboardio-Imago/src/kaleidoscope/device/keyboardio/twi.c
similarity index 100%
rename from src/kaleidoscope/device/keyboardio/twi.c
rename to plugins/Kaleidoscope-Hardware-Keyboardio-Imago/src/kaleidoscope/device/keyboardio/twi.c
diff --git a/src/kaleidoscope/device/keyboardio/twi.h b/plugins/Kaleidoscope-Hardware-Keyboardio-Imago/src/kaleidoscope/device/keyboardio/twi.h
similarity index 100%
rename from src/kaleidoscope/device/keyboardio/twi.h
rename to plugins/Kaleidoscope-Hardware-Keyboardio-Imago/src/kaleidoscope/device/keyboardio/twi.h
diff --git a/plugins/Kaleidoscope-Hardware-Keyboardio-Model01/library.properties b/plugins/Kaleidoscope-Hardware-Keyboardio-Model01/library.properties
new file mode 100644
index 00000000..e70cab4c
--- /dev/null
+++ b/plugins/Kaleidoscope-Hardware-Keyboardio-Model01/library.properties
@@ -0,0 +1,2 @@
+name=Kaleidoscope-Hardware-Keyboardio-Model01
+version=0.0.0
diff --git a/src/Kaleidoscope-Hardware-Model01.h b/plugins/Kaleidoscope-Hardware-Keyboardio-Model01/src/Kaleidoscope-Hardware-Keyboardio-Model01.h
similarity index 100%
rename from src/Kaleidoscope-Hardware-Model01.h
rename to plugins/Kaleidoscope-Hardware-Keyboardio-Model01/src/Kaleidoscope-Hardware-Keyboardio-Model01.h
diff --git a/src/kaleidoscope/device/keyboardio/Model01.cpp b/plugins/Kaleidoscope-Hardware-Keyboardio-Model01/src/kaleidoscope/device/keyboardio/Model01.cpp
similarity index 100%
rename from src/kaleidoscope/device/keyboardio/Model01.cpp
rename to plugins/Kaleidoscope-Hardware-Keyboardio-Model01/src/kaleidoscope/device/keyboardio/Model01.cpp
diff --git a/src/kaleidoscope/device/keyboardio/Model01.h b/plugins/Kaleidoscope-Hardware-Keyboardio-Model01/src/kaleidoscope/device/keyboardio/Model01.h
similarity index 100%
rename from src/kaleidoscope/device/keyboardio/Model01.h
rename to plugins/Kaleidoscope-Hardware-Keyboardio-Model01/src/kaleidoscope/device/keyboardio/Model01.h
diff --git a/plugins/Kaleidoscope-Hardware-Keyboardio-Model01/src/kaleidoscope/device/keyboardio/twi.c b/plugins/Kaleidoscope-Hardware-Keyboardio-Model01/src/kaleidoscope/device/keyboardio/twi.c
new file mode 100644
index 00000000..bd00c078
--- /dev/null
+++ b/plugins/Kaleidoscope-Hardware-Keyboardio-Model01/src/kaleidoscope/device/keyboardio/twi.c
@@ -0,0 +1,574 @@
+/*
+ twi.c - TWI/I2C library for Wiring & Arduino
+ Copyright (c) 2006 Nicholas Zambetti. All right reserved.
+
+ This library is free software: you can redistribute it and/or modify it under
+ the terms of the GNU Lesser General Public License as published by the Free
+ Software Foundation, either version 3 of the License, or (at your option) any
+ later version.
+
+ This library is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
+ details.
+
+ You should have received a copy of the GNU Lesser General Public License along
+ with this program. If not, see .
+
+ Modified 2012 by Todd Krein (todd@krein.org) to implement repeated starts
+*/
+
+#if defined(__AVR__) && !defined(KALEIDOSCOPE_VIRTUAL_BUILD)
+
+#define ENABLE_TWI_SLAVE_MODE 0
+
+#include
+#include
+#include
+#include
+#include
+#include
+// #include "Arduino.h" // for digitalWrite
+
+#define true 1
+#define false 0
+
+
+#ifndef cbi
+#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
+#endif
+
+#ifndef sbi
+#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
+#endif
+
+#include "pins_arduino.h"
+#include "twi.h"
+
+static volatile uint8_t twi_state;
+static volatile uint8_t twi_slarw;
+static volatile uint8_t twi_sendStop; // should the transaction end with a stop
+static volatile uint8_t twi_inRepStart; // in the middle of a repeated start
+
+static void (*twi_onSlaveTransmit)(void);
+static void (*twi_onSlaveReceive)(uint8_t*, int);
+
+static uint8_t twi_masterBuffer[TWI_BUFFER_LENGTH];
+static volatile uint8_t twi_masterBufferIndex;
+static volatile uint8_t twi_masterBufferLength;
+
+static uint8_t twi_txBuffer[TWI_BUFFER_LENGTH];
+static volatile uint8_t twi_txBufferIndex;
+static volatile uint8_t twi_txBufferLength;
+
+#if ENABLE_TWI_SLAVE_MODE
+static uint8_t twi_rxBuffer[TWI_BUFFER_LENGTH];
+static volatile uint8_t twi_rxBufferIndex;
+#endif
+
+static volatile uint8_t twi_error;
+
+/*
+ * Function twi_init
+ * Desc readys twi pins and sets twi bitrate
+ * Input none
+ * Output none
+ */
+void twi_init(void) {
+ // initialize state
+ twi_state = TWI_READY;
+ twi_sendStop = true; // default value
+ twi_inRepStart = false;
+
+ // activate internal pullups for twi.
+ // digitalWrite(SDA, 1);
+ PORTD |= _BV(0);
+ // digitalWrite(SCL, 1);
+ PORTD |= _BV(1);
+
+ // initialize twi prescaler and bit rate
+ cbi(TWSR, TWPS0);
+ cbi(TWSR, TWPS1);
+ TWBR = ((F_CPU / TWI_FREQ) - 16) / 2;
+
+ /* twi bit rate formula from atmega128 manual pg 204
+ SCL Frequency = CPU Clock Frequency / (16 + (2 * TWBR))
+ note: TWBR should be 10 or higher for master mode
+ It is 72 for a 16mhz Wiring board with 100kHz TWI */
+
+ // enable twi module, acks, and twi interrupt
+ TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWEA);
+}
+
+/*
+ * Function twi_disable
+ * Desc disables twi pins
+ * Input none
+ * Output none
+ */
+void twi_disable(void) {
+ // disable twi module, acks, and twi interrupt
+ TWCR &= ~(_BV(TWEN) | _BV(TWIE) | _BV(TWEA));
+
+ // deactivate internal pullups for twi.
+ // digitalWrite(SDA, 0);
+ PORTD &= ~_BV(0);
+ // digitalWrite(SCL, 0);
+ PORTD &= ~_BV(1);
+}
+
+/*
+ * Function twi_slaveInit
+ * Desc sets slave address and enables interrupt
+ * Input none
+ * Output none
+ */
+void twi_setAddress(uint8_t address) {
+ // set twi slave address (skip over TWGCE bit)
+ TWAR = address << 1;
+}
+
+/*
+ * Function twi_setClock
+ * Desc sets twi bit rate
+ * Input Clock Frequency
+ * Output none
+ */
+void twi_setFrequency(uint32_t frequency) {
+ TWBR = ((F_CPU / frequency) - 16) / 2;
+
+ /* twi bit rate formula from atmega128 manual pg 204
+ SCL Frequency = CPU Clock Frequency / (16 + (2 * TWBR))
+ note: TWBR should be 10 or higher for master mode
+ It is 72 for a 16mhz Wiring board with 100kHz TWI */
+}
+
+/*
+ * Function twi_readFrom
+ * Desc attempts to become twi bus master and read a
+ * series of bytes from a device on the bus
+ * Input address: 7bit i2c device address
+ * data: pointer to byte array
+ * length: number of bytes to read into array
+ * sendStop: Boolean indicating whether to send a stop at the end
+ * Output number of bytes read
+ */
+uint8_t twi_readFrom(uint8_t address, uint8_t* data, uint8_t length, uint8_t sendStop) {
+ uint8_t i;
+
+ // ensure data will fit into buffer
+ if (TWI_BUFFER_LENGTH < length) {
+ return 0;
+ }
+
+ // wait until twi is ready, become master receiver
+ while (TWI_READY != twi_state) {
+ continue;
+ }
+ twi_state = TWI_MRX;
+ twi_sendStop = sendStop;
+ // reset error state (0xFF.. no error occured)
+ twi_error = 0xFF;
+
+ // initialize buffer iteration vars
+ twi_masterBufferIndex = 0;
+ twi_masterBufferLength = length - 1; // This is not intuitive, read on...
+ // On receive, the previously configured ACK/NACK setting is transmitted in
+ // response to the received byte before the interrupt is signalled.
+ // Therefor we must actually set NACK when the _next_ to last byte is
+ // received, causing that NACK to be sent in response to receiving the last
+ // expected byte of data.
+
+ // build sla+w, slave device address + w bit
+ twi_slarw = TW_READ;
+ twi_slarw |= address << 1;
+
+ if (true == twi_inRepStart) {
+ // if we're in the repeated start state, then we've already sent the start,
+ // (@@@ we hope), and the TWI statemachine is just waiting for the address byte.
+ // We need to remove ourselves from the repeated start state before we enable interrupts,
+ // since the ISR is ASYNC, and we could get confused if we hit the ISR before cleaning
+ // up. Also, don't enable the START interrupt. There may be one pending from the
+ // repeated start that we sent ourselves, and that would really confuse things.
+ twi_inRepStart = false; // remember, we're dealing with an ASYNC ISR
+ do {
+ TWDR = twi_slarw;
+ } while (TWCR & _BV(TWWC));
+ TWCR = _BV(TWINT) | _BV(TWEA) | _BV(TWEN) | _BV(TWIE); // enable INTs, but not START
+ } else
+ // send start condition
+ TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWEA) | _BV(TWINT) | _BV(TWSTA);
+
+ // wait for read operation to complete
+ while (TWI_MRX == twi_state) {
+ continue;
+ }
+
+ if (twi_masterBufferIndex < length)
+ length = twi_masterBufferIndex;
+
+ // copy twi buffer to data
+ for (i = 0; i < length; ++i) {
+ data[i] = twi_masterBuffer[i];
+ }
+
+ return length;
+}
+
+/*
+ * Function twi_writeTo
+ * Desc attempts to become twi bus master and write a
+ * series of bytes to a device on the bus
+ * Input address: 7bit i2c device address
+ * data: pointer to byte array
+ * length: number of bytes in array
+ * wait: boolean indicating to wait for write or not
+ * sendStop: boolean indicating whether or not to send a stop at the end
+ * Output 0 .. success
+ * 1 .. length to long for buffer
+ * 2 .. address send, NACK received
+ * 3 .. data send, NACK received
+ * 4 .. other twi error (lost bus arbitration, bus error, ..)
+ */
+uint8_t twi_writeTo(uint8_t address, uint8_t* data, uint8_t length, uint8_t wait, uint8_t sendStop) {
+ uint8_t i;
+
+ // ensure data will fit into buffer
+ if (TWI_BUFFER_LENGTH < length) {
+ return 1;
+ }
+
+ // wait until twi is ready, become master transmitter
+ while (TWI_READY != twi_state) {
+ continue;
+ }
+ twi_state = TWI_MTX;
+ twi_sendStop = sendStop;
+ // reset error state (0xFF.. no error occured)
+ twi_error = 0xFF;
+
+ // initialize buffer iteration vars
+ twi_masterBufferIndex = 0;
+ twi_masterBufferLength = length;
+
+ // copy data to twi buffer
+ for (i = 0; i < length; ++i) {
+ twi_masterBuffer[i] = data[i];
+ }
+
+ // build sla+w, slave device address + w bit
+ twi_slarw = TW_WRITE;
+ twi_slarw |= address << 1;
+
+ // if we're in a repeated start, then we've already sent the START
+ // in the ISR. Don't do it again.
+ //
+ if (true == twi_inRepStart) {
+ // if we're in the repeated start state, then we've already sent the start,
+ // (@@@ we hope), and the TWI statemachine is just waiting for the address byte.
+ // We need to remove ourselves from the repeated start state before we enable interrupts,
+ // since the ISR is ASYNC, and we could get confused if we hit the ISR before cleaning
+ // up. Also, don't enable the START interrupt. There may be one pending from the
+ // repeated start that we sent outselves, and that would really confuse things.
+ twi_inRepStart = false; // remember, we're dealing with an ASYNC ISR
+ do {
+ TWDR = twi_slarw;
+ } while (TWCR & _BV(TWWC));
+ TWCR = _BV(TWINT) | _BV(TWEA) | _BV(TWEN) | _BV(TWIE); // enable INTs, but not START
+ } else
+ // send start condition
+ TWCR = _BV(TWINT) | _BV(TWEA) | _BV(TWEN) | _BV(TWIE) | _BV(TWSTA); // enable INTs
+
+ // wait for write operation to complete
+ while (wait && (TWI_MTX == twi_state)) {
+ continue;
+ }
+
+ switch (twi_error) {
+ case 0xFF:
+ return 0; // success
+ case TW_MT_SLA_NACK:
+ return 2; // error: address send, nack received
+ case TW_MT_DATA_NACK:
+ return 3; // error: data send, nack received
+ default:
+ return 4; // other twi error
+ }
+}
+
+/*
+ * Function twi_transmit
+ * Desc fills slave tx buffer with data
+ * must be called in slave tx event callback
+ * Input data: pointer to byte array
+ * length: number of bytes in array
+ * Output 1 length too long for buffer
+ * 2 not slave transmitter
+ * 0 ok
+ */
+uint8_t twi_transmit(const uint8_t* data, uint8_t length) {
+ uint8_t i;
+
+ // ensure data will fit into buffer
+ if (TWI_BUFFER_LENGTH < (twi_txBufferLength + length)) {
+ return 1;
+ }
+
+ // ensure we are currently a slave transmitter
+ if (TWI_STX != twi_state) {
+ return 2;
+ }
+
+ // set length and copy data into tx buffer
+ for (i = 0; i < length; ++i) {
+ twi_txBuffer[twi_txBufferLength + i] = data[i];
+ }
+ twi_txBufferLength += length;
+
+ return 0;
+}
+
+/*
+ * Function twi_attachSlaveRxEvent
+ * Desc sets function called before a slave read operation
+ * Input function: callback function to use
+ * Output none
+ */
+void twi_attachSlaveRxEvent(void (*function)(uint8_t*, int)) {
+ twi_onSlaveReceive = function;
+}
+
+/*
+ * Function twi_attachSlaveTxEvent
+ * Desc sets function called before a slave write operation
+ * Input function: callback function to use
+ * Output none
+ */
+void twi_attachSlaveTxEvent(void (*function)(void)) {
+ twi_onSlaveTransmit = function;
+}
+
+/*
+ * Function twi_reply
+ * Desc sends byte or readys receive line
+ * Input ack: byte indicating to ack or to nack
+ * Output none
+ */
+void twi_reply(uint8_t ack) {
+ // transmit master read ready signal, with or without ack
+ if (ack) {
+ TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWINT) | _BV(TWEA);
+ } else {
+ TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWINT);
+ }
+}
+
+/*
+ * Function twi_stop
+ * Desc relinquishes bus master status
+ * Input none
+ * Output none
+ */
+void twi_stop(void) {
+ // send stop condition
+ TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWEA) | _BV(TWINT) | _BV(TWSTO);
+
+ // wait for stop condition to be exectued on bus
+ // TWINT is not set after a stop condition!
+ while (TWCR & _BV(TWSTO)) {
+ continue;
+ }
+
+ // update twi state
+ twi_state = TWI_READY;
+}
+
+/*
+ * Function twi_releaseBus
+ * Desc releases bus control
+ * Input none
+ * Output none
+ */
+void twi_releaseBus(void) {
+ // release bus
+ TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWEA) | _BV(TWINT);
+
+ // update twi state
+ twi_state = TWI_READY;
+}
+
+ISR(TWI_vect) {
+ switch (TW_STATUS) {
+ // All Master
+ case TW_START: // sent start condition
+ /* Falls through. */
+ case TW_REP_START: // sent repeated start condition
+ // copy device address and r/w bit to output register and ack
+ TWDR = twi_slarw;
+ twi_reply(1);
+ break;
+
+ // Master Transmitter
+ case TW_MT_SLA_ACK: // slave receiver acked address
+ /* Falls through. */
+ case TW_MT_DATA_ACK: // slave receiver acked data
+ // if there is data to send, send it, otherwise stop
+ if (twi_masterBufferIndex < twi_masterBufferLength) {
+ // copy data to output register and ack
+ TWDR = twi_masterBuffer[twi_masterBufferIndex++];
+ twi_reply(1);
+ } else {
+ if (twi_sendStop)
+ twi_stop();
+ else {
+ twi_inRepStart = true; // we're gonna send the START
+ // don't enable the interrupt. We'll generate the start, but we
+ // avoid handling the interrupt until we're in the next transaction,
+ // at the point where we would normally issue the start.
+ TWCR = _BV(TWINT) | _BV(TWSTA) | _BV(TWEN) ;
+ twi_state = TWI_READY;
+ }
+ }
+ break;
+ case TW_MT_SLA_NACK: // address sent, nack received
+ twi_error = TW_MT_SLA_NACK;
+ twi_stop();
+ break;
+ case TW_MT_DATA_NACK: // data sent, nack received
+ twi_error = TW_MT_DATA_NACK;
+ twi_stop();
+ break;
+ case TW_MT_ARB_LOST: // lost bus arbitration
+ twi_error = TW_MT_ARB_LOST;
+ twi_releaseBus();
+ break;
+
+ // Master Receiver
+ case TW_MR_DATA_ACK: // data received, ack sent
+ // put byte into buffer
+ twi_masterBuffer[twi_masterBufferIndex++] = TWDR;
+ /* intentionally fall through */
+ case TW_MR_SLA_ACK: // address sent, ack received
+ // ack if more bytes are expected, otherwise nack
+ if (twi_masterBufferIndex < twi_masterBufferLength) {
+ twi_reply(1);
+ } else {
+ twi_reply(0);
+ }
+ break;
+ case TW_MR_DATA_NACK: // data received, nack sent
+ // put final byte into buffer
+ twi_masterBuffer[twi_masterBufferIndex++] = TWDR;
+ if (twi_sendStop)
+ twi_stop();
+ else {
+ twi_inRepStart = true; // we're gonna send the START
+ // don't enable the interrupt. We'll generate the start, but we
+ // avoid handling the interrupt until we're in the next transaction,
+ // at the point where we would normally issue the start.
+ TWCR = _BV(TWINT) | _BV(TWSTA) | _BV(TWEN) ;
+ twi_state = TWI_READY;
+ }
+ break;
+ case TW_MR_SLA_NACK: // address sent, nack received
+ twi_stop();
+ break;
+ // TW_MR_ARB_LOST handled by TW_MT_ARB_LOST case
+
+#if ENABLE_TWI_SLAVE_MODE
+ // Slave Receiver
+ case TW_SR_SLA_ACK: // addressed, returned ack
+ /* Falls through. */
+ case TW_SR_GCALL_ACK: // addressed generally, returned ack
+ /* Falls through. */
+ case TW_SR_ARB_LOST_SLA_ACK: // lost arbitration, returned ack
+ /* Falls through. */
+ case TW_SR_ARB_LOST_GCALL_ACK: // lost arbitration, returned ack
+ // enter slave receiver mode
+ twi_state = TWI_SRX;
+ // indicate that rx buffer can be overwritten and ack
+ twi_rxBufferIndex = 0;
+ twi_reply(1);
+ break;
+ case TW_SR_DATA_ACK: // data received, returned ack
+ /* Falls through. */
+ case TW_SR_GCALL_DATA_ACK: // data received generally, returned ack
+ // if there is still room in the rx buffer
+ if (twi_rxBufferIndex < TWI_BUFFER_LENGTH) {
+ // put byte in buffer and ack
+ twi_rxBuffer[twi_rxBufferIndex++] = TWDR;
+ twi_reply(1);
+ } else {
+ // otherwise nack
+ twi_reply(0);
+ }
+ break;
+ case TW_SR_STOP: // stop or repeated start condition received
+ // ack future responses and leave slave receiver state
+ twi_releaseBus();
+ // put a null char after data if there's room
+ if (twi_rxBufferIndex < TWI_BUFFER_LENGTH) {
+ twi_rxBuffer[twi_rxBufferIndex] = '\0';
+ }
+ // callback to user defined callback
+ twi_onSlaveReceive(twi_rxBuffer, twi_rxBufferIndex);
+ // since we submit rx buffer to "wire" library, we can reset it
+ twi_rxBufferIndex = 0;
+ break;
+ case TW_SR_DATA_NACK: // data received, returned nack
+ /* Falls through. */
+ case TW_SR_GCALL_DATA_NACK: // data received generally, returned nack
+ // nack back at master
+ twi_reply(0);
+ break;
+
+ // Slave Transmitter
+ case TW_ST_SLA_ACK: // addressed, returned ack
+ /* Falls through. */
+ case TW_ST_ARB_LOST_SLA_ACK: // arbitration lost, returned ack
+ // enter slave transmitter mode
+ twi_state = TWI_STX;
+ // ready the tx buffer index for iteration
+ twi_txBufferIndex = 0;
+ // set tx buffer length to be zero, to verify if user changes it
+ twi_txBufferLength = 0;
+ // request for txBuffer to be filled and length to be set
+ // note: user must call twi_transmit(bytes, length) to do this
+ twi_onSlaveTransmit();
+ // if they didn't change buffer & length, initialize it
+ if (0 == twi_txBufferLength) {
+ twi_txBufferLength = 1;
+ twi_txBuffer[0] = 0x00;
+ }
+ // transmit first byte from buffer, fall through
+ case TW_ST_DATA_ACK: // byte sent, ack returned
+ // copy data to output register
+ TWDR = twi_txBuffer[twi_txBufferIndex++];
+ // if there is more to send, ack, otherwise nack
+ if (twi_txBufferIndex < twi_txBufferLength) {
+ twi_reply(1);
+ } else {
+ twi_reply(0);
+ }
+ break;
+ case TW_ST_DATA_NACK: // received nack, we are done
+ /* Falls through. */
+ case TW_ST_LAST_DATA: // received ack, but we are done already!
+ // ack future responses
+ twi_reply(1);
+ // leave slave receiver state
+ twi_state = TWI_READY;
+ break;
+#endif
+
+ // All
+ case TW_NO_INFO: // no state information
+ break;
+ case TW_BUS_ERROR: // bus error, illegal stop/start
+ twi_error = TW_BUS_ERROR;
+ twi_stop();
+ break;
+ }
+}
+
+#endif
diff --git a/plugins/Kaleidoscope-Hardware-Keyboardio-Model01/src/kaleidoscope/device/keyboardio/twi.h b/plugins/Kaleidoscope-Hardware-Keyboardio-Model01/src/kaleidoscope/device/keyboardio/twi.h
new file mode 100644
index 00000000..773ce9cb
--- /dev/null
+++ b/plugins/Kaleidoscope-Hardware-Keyboardio-Model01/src/kaleidoscope/device/keyboardio/twi.h
@@ -0,0 +1,57 @@
+/*
+ twi.h - TWI/I2C library for Wiring & Arduino
+ Copyright (c) 2006 Nicholas Zambetti. All right reserved.
+
+ This library is free software: you can redistribute it and/or modify it under
+ the terms of the GNU Lesser General Public License as published by the Free
+ Software Foundation, either version 3 of the License, or (at your option) any
+ later version.
+
+ This library is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
+ details.
+
+ You should have received a copy of the GNU Lesser General Public License along
+ with this program. If not, see .
+*/
+
+#pragma once
+
+#ifdef __AVR__
+
+#ifndef KALEIDOSCOPE_VIRTUAL_BUILD
+
+#include
+
+//#define ATMEGA8
+
+#ifndef TWI_FREQ
+#define TWI_FREQ 100000L
+#endif
+
+#ifndef TWI_BUFFER_LENGTH
+#define TWI_BUFFER_LENGTH 192
+#endif
+
+#define TWI_READY 0
+#define TWI_MRX 1
+#define TWI_MTX 2
+#define TWI_SRX 3
+#define TWI_STX 4
+
+void twi_init(void);
+void twi_disable(void);
+void twi_setAddress(uint8_t);
+void twi_setFrequency(uint32_t);
+uint8_t twi_readFrom(uint8_t, uint8_t*, uint8_t, uint8_t);
+uint8_t twi_writeTo(uint8_t, uint8_t*, uint8_t, uint8_t, uint8_t);
+uint8_t twi_transmit(const uint8_t*, uint8_t);
+void twi_attachSlaveRxEvent(void (*)(uint8_t*, int));
+void twi_attachSlaveTxEvent(void (*)(void));
+void twi_reply(uint8_t);
+void twi_stop(void);
+void twi_releaseBus(void);
+
+#endif // ifndef KALEIDOSCOPE_VIRTUAL_BUILD
+#endif
diff --git a/plugins/Kaleidoscope-Hardware-Model01/library.properties b/plugins/Kaleidoscope-Hardware-Model01/library.properties
new file mode 100644
index 00000000..1fa25fa5
--- /dev/null
+++ b/plugins/Kaleidoscope-Hardware-Model01/library.properties
@@ -0,0 +1,3 @@
+name=Kaleidoscope-Hardware-Model01
+description=A compatibility shim for the old name for the Model 01 plugin before we started sticking manufacturer names in plugin names
+version=0.0.0
diff --git a/plugins/Kaleidoscope-Hardware-Model01/src/Kaleidoscope-Hardware-Model01.h b/plugins/Kaleidoscope-Hardware-Model01/src/Kaleidoscope-Hardware-Model01.h
new file mode 100644
index 00000000..6b4a1c37
--- /dev/null
+++ b/plugins/Kaleidoscope-Hardware-Model01/src/Kaleidoscope-Hardware-Model01.h
@@ -0,0 +1,20 @@
+/* -*- mode: c++ -*-
+ * Kaleidoscope-Hardware-Model01 -- Keyboard.io Model01 hardware support for Kaleidoscope
+ * Copyright (C) 2017-2019 Keyboard.io, Inc
+ *
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see .
+ */
+
+#pragma once
+
+#include "Kaleidoscope-Hardware-Keyboardio-Model01.h"