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
+----+