Atmel studio code for ATMEGA128A to communicate with ENC28J60 through SPI as TCP/IP Client
Budget: $10 – $30 USD
The code must wait for new data, and if received must save it in a buffer (array of char) and respond with echo of same data as an acknowledgment. The code has to be fast enough to handle data and send back acknowledging echo at high rate (>10KHz)