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Is the FT232R (an FTDI chip) the least expensive way to get USB to Arduino? I'm trying to hookup a wireless nrf24L01+ to USB (which talks to another nrf24l01+ a
by conesus 13y ago
Is the FT232R (an FTDI chip) the least expensive way to get USB to Arduino? I'm trying to hookup a wireless nrf24L01+ to USB (which talks to another nrf24l01+ and an atmega328p), and I'm looking at PIC chips which are around $2, whereas the FT232R is $4.
- makomk 13y agoIt's not even close to the least expensive way - various Chinese-made USB-to-serial chips are cheaper, as is the Atmega8u2 used on more recent Arduinos. The Atmega8u2 is a fully-programmable microcontroller too, as are the larger chips in the range.
- veemjeem 13y agoYou don't even need that. The attiny85 is sufficient. See https://github.com/Bluebie/micronucleus-t85 https://github.com/Bluebie/micronucleus-t85 It's a bootloader that detects usb in the boot process. If usb is hooked up, you can upload programs, then it will run whatever code is loaded. This bootloader is the same one used on the digistump. You need 3 diodes and 2 resistors along with the attiny85 chip to make your own usb to serial converter.