{"id":58,"date":"2022-10-02T14:48:46","date_gmt":"2022-10-02T14:48:46","guid":{"rendered":"https:\/\/engprojects.tcnj.edu\/rover-rescue\/?p=58"},"modified":"2022-10-02T23:01:14","modified_gmt":"2022-10-02T23:01:14","slug":"raspberry-pi-4-to-arduino-mega-serial-communication","status":"publish","type":"post","link":"https:\/\/engprojects.tcnj.edu\/rover-rescue\/2022\/10\/02\/raspberry-pi-4-to-arduino-mega-serial-communication\/","title":{"rendered":"Project Update 4: Raspberry Pi 4 to Arduino Mega Serial Communication"},"content":{"rendered":"
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Figure 1: Raspberry Pi and Arduino Mega Serial Communication via USB<\/figcaption><\/figure><\/div>\n\n\n

The group was able to send messages between the Raspberry Pi 4 and Arduino Mega via serial communication. A python script running on the Pi accepts a number from the command line and sends it to the Mega using a popular Python library for sending serial information called PySerial. The Mega then increments the number by 1 and sends it back to the Raspberry Pi which will display the new number to the terminal. <\/p>\n\n\n\n

The serial.Serial(…) command on line 3 opens serial communication on port \/dev\/ttyACM0 because the Mega was connected to port \/dev\/ttyACM0 on the Pi. Notice how the baud rate on the Pi must match the baud rate on the Mega (115,200 Hz). <\/p>\n\n\n\n

The terminal shows the result of running the Python code after uploading the Arduino .ino file to the Mega. <\/p>\n\n\n\n

Python Code<\/h2>\n\n\n\n
import serial\nimport time\narduino = serial.Serial(port='\/dev\/ttyACM0', baudrate=115200, timeout=.1)\ndef write_read(x):\n    arduino.write(bytes(x, 'utf-8'))\n    time.sleep(0.05)\n    data = arduino.readline()\n    return data\nwhile True:\n    num = input(\"Enter a number: \") # Taking input from user\n    value = write_read(num)\n    print(value) # printing the value<\/code><\/pre>\n\n\n\n
Arduino Code<\/h2>\n\n\n\n
int x;\n\nvoid setup() {\n  Serial.begin(115200);\n  Serial.setTimeout(1);\n}\n\nvoid loop() {\n  while (!Serial.available());\n  x = Serial.readString().toInt();\n  Serial.print(x + 1);\n}<\/code><\/pre>\n\n\n\n
Running PySerial in Raspberry Pi Terminal<\/h2>\n\n\n\n
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The group was able to send messages between the Raspberry Pi 4 and Arduino Mega via serial communication. A python script running on the Pi accepts a number from the command line and sends it to the Mega using a popular Python library for sending serial information called PySerial. The Mega then increments the number … <\/p>\n
Continue reading “Project Update 4: Raspberry Pi 4 to Arduino Mega Serial Communication”<\/span><\/a><\/p>\n","protected":false},"author":438,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-58","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/engprojects.tcnj.edu\/rover-rescue\/wp-json\/wp\/v2\/posts\/58","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/engprojects.tcnj.edu\/rover-rescue\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/engprojects.tcnj.edu\/rover-rescue\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/engprojects.tcnj.edu\/rover-rescue\/wp-json\/wp\/v2\/users\/438"}],"replies":[{"embeddable":true,"href":"https:\/\/engprojects.tcnj.edu\/rover-rescue\/wp-json\/wp\/v2\/comments?post=58"}],"version-history":[{"count":0,"href":"https:\/\/engprojects.tcnj.edu\/rover-rescue\/wp-json\/wp\/v2\/posts\/58\/revisions"}],"wp:attachment":[{"href":"https:\/\/engprojects.tcnj.edu\/rover-rescue\/wp-json\/wp\/v2\/media?parent=58"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/engprojects.tcnj.edu\/rover-rescue\/wp-json\/wp\/v2\/categories?post=58"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/engprojects.tcnj.edu\/rover-rescue\/wp-json\/wp\/v2\/tags?post=58"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}