{"id":8268,"date":"2014-02-17T10:53:29","date_gmt":"2014-02-17T15:53:29","guid":{"rendered":"http:\/\/embedded-lab.com\/blog\/?p=8268"},"modified":"2014-02-17T10:53:29","modified_gmt":"2014-02-17T15:53:29","slug":"nrf24l01-rf-module-and-attiny85","status":"publish","type":"post","link":"https:\/\/embedded-lab.com\/blog\/nrf24l01-rf-module-and-attiny85\/","title":{"rendered":"nrf24l01+ RF module and ATtiny85"},"content":{"rendered":"<p>Ralph Doncaster writes,<\/p>\n<blockquote><p>Nrf24l01+ modules are a cheap and low-power option for MCU wireless communication. Libraries are available for Arduino, and for arduino compatible MCUs like the ATTiny85. Controlling the nrf modules usually requires power plus 5 pins &#8211; CE, CSN, SCK, MOSI, &amp; MISO. With pin-limited MCUs like the ATtiny85, 5 pins is a lot to tie up. On something like the Digispark, with PB3 and PB4 hard-wired to USB+ and USB-, using the nrf24l01+ modules might seem impossible. Another issue is that although the nrf inputs are 5v tolerant, Vcc must be between 1.9 and 3.6V. I&#8217;ve designed a simple solution to provide 3V power as well as control the modules with just 3 of the pins on the ATtiny85.<\/p><\/blockquote>\n<div id=\"attachment_8270\" style=\"width: 404px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/embedded-lab.com\/blog\/wp-content\/uploads\/2014\/02\/DigiCSN.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-8270\" class=\"size-full wp-image-8270\" alt=\"Controlling Nrf24l01+ RF module with 3 I\/O pins\" src=\"http:\/\/embedded-lab.com\/blog\/wp-content\/uploads\/2014\/02\/DigiCSN.jpg\" width=\"394\" height=\"220\" \/><\/a><p id=\"caption-attachment-8270\" class=\"wp-caption-text\">Controlling Nrf24l01+ RF module with 3 I\/O pins<\/p><\/div>\n<p><a href=\"http:\/\/nerdralph.blogspot.com\/2014\/01\/nrf24l01-control-with-3-attiny85-pins.html\" target=\"_blank\"><strong>Read more<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ralph Doncaster writes, Nrf24l01+ modules are a cheap and low-power option for MCU wireless communication. Libraries are available for Arduino, and for arduino compatible MCUs like the ATTiny85. Controlling the nrf modules usually requires power plus 5 pins &#8211; CE, CSN, SCK, MOSI, &amp; MISO. With pin-limited MCUs like the ATtiny85, 5 pins is a lot to tie up. On something like the Digispark, with PB3 and PB4 hard-wired to USB+ and USB-, using the nrf24l01+ modules might seem impossible. Another issue is that although the nrf inputs are 5v tolerant, Vcc must be between 1.9 and 3.6V. I&#8217;ve designed<\/p>\n","protected":false},"author":1,"featured_media":8270,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[150,183],"tags":[148,71,727],"class_list":["post-8268","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-arduino-2","category-tips-and-tricks","tag-arduino","tag-attiny85","tag-nrf24l01-rf-module"],"_links":{"self":[{"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts\/8268","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/comments?post=8268"}],"version-history":[{"count":3,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts\/8268\/revisions"}],"predecessor-version":[{"id":8272,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts\/8268\/revisions\/8272"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/media\/8270"}],"wp:attachment":[{"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/media?parent=8268"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/categories?post=8268"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/tags?post=8268"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}