ATTiny Support

ATTiny support for this library relys on the SpenceKonde ATTinyCore. Be sure to have added this core to the Arduino Boards Manager by following this guide

See the included rf24ping85 example for pin info and usage

Some versions of Arduino IDE may require a patch to allow use of the full program space on ATTiny<br> See https://github.com/TCWORLD/ATTinyCore/tree/master/PCREL%20Patch%20for%20GCC for ATTiny patch

Hardware Hardware Configuration

ATTiny board support initially added from jscrane’s fork The pin layouts found here and rf24_ATTiny example written by tong67

ATtiny25/45/85

Pin map with CE_PIN 3 and CSN_PIN 4

                       +-\/-+
                 PB5  1|o   |8  Vcc --- nRF24L01  VCC --- LED --- 5V
nRF24L01  CE --- PB3  2|    |7  PB2 --- nRF24L01  SCK
nRF24L01 CSN --- PB4  3|    |6  PB1 --- nRF24L01 MOSI
nRF24L01 GND --- GND  4|    |5  PB0 --- nRF24L01 MISO
                       +----+

ATtiny25/45/85 using 3 pins

Pin map with CE_PIN 3 and CSN_PIN 3. PB3 and PB4 are free to use for application Circuit idea from NerdRalph’ 3 pin solution Original RC combination was 1K/100nF. 22K/10nF combination worked better. For best settletime delay value in RF24Revamped::csn() the timingSearch3pin.ino sketch can be used. This configuration is enabled when CE_PIN and CSN_PIN are equal, e.g. both 3 Because CE is always high the power consumption is higher than for 5 pins solution

                                                                            ^^
                       +-\/-+           nRF24L01   CE ------|              //
                 PB5  1|o   |8  Vcc --- nRF24L01  VCC ------x----------x--|<|-- 5V
                 PB3  2|    |7  PB2 --- nRF24L01  SCK --|<|---x-[22k]--|  LED
                 PB4  3|    |6  PB1 --- nRF24L01 MOSI  1n4148 |
nRF24L01 GND -x- GND  4|    |5  PB0 --- nRF24L01 MISO         |
              |        +----+                                 |
              |-----------------------------------------||----x-- nRF24L01 CSN, pin4
                                                            10nF

ATtiny24/44/84

Pin map with CE_PIN 8 and CSN_PIN 7

Schematic provided and successfully tested by Carmine Pastore

                        +-\/-+
nRF24L01  VCC --- VCC  1|o   |14 GND --- nRF24L01  GND
                  PB0  2|    |13 AREF
                  PB1  3|    |12 PA1
                  PB3  4|    |11 PA2 --- nRF24L01   CE
                  PB2  5|    |10 PA3 --- nRF24L01  CSN
                  PA7  6|    |9  PA4 --- nRF24L01  SCK
nRF24L01 MISO --- PA6  7|    |8  PA5 --- nRF24L01 MOSI
                        +----+

ATtiny2313/4313

Pin map with CE_PIN 12 and CSN_PIN 13

                        +-\/-+
                  PA2  1|o   |20 VCC --- nRF24L01  VCC
                  PD0  2|    |19 PB7 --- nRF24L01  SCK
                  PD1  3|    |18 PB6 --- nRF24L01 MOSI
                  PA1  4|    |17 PB5 --- nRF24L01 MISO
                  PA0  5|    |16 PB4 --- nRF24L01  CSN
                  PD2  6|    |15 PB3 --- nRF24L01   CE
                  PD3  7|    |14 PB2
                  PD4  8|    |13 PB1
                  PD5  9|    |12 PB0
nRF24L01  GND --- GND 10|    |11 PD6
                        +----+