send gpio commands from rpi python script to another rpi

Question

it is possible to control the Gpio of a raspberry pi connected by WiFi by another raspberry pi by a python script? I need to Connect\disconect some electric loads of my house switchboard, controled by a script runnig in a raspberry PI in my garage, this one manage the solar system like the charge of the baterries. Try to use a remote controle AC switch but is to far and ins't reayable.

Answer 1

My pigpio Python module lets you control many networked Pis from one Python script.

The controlling script can be running on Windows, Mac, Linux, or a Raspberry Pi, i.e. anything which can run Python.

The Pis to be controlled each require the pigpio daemon to be running.

Answer 2

You can use the SocketServer module to create a server on your pi which will make the GPIO actions. Then you can connect with your second pi as a client to that server an send your commands.

Basic exmaple from the docs:

server.py

import SocketServer
class MyTCPHandler(SocketServer.BaseRequestHandler):
 """
 The RequestHandler class for our server.
 It is instantiated once per connection to the server, and must
 override the handle() method to implement communication to the
 client.
 """
 def handle(self):
 # self.request is the TCP socket connected to the client
 self.data = self.request.recv(1024).strip()
 print "{} wrote:".format(self.client_address[0])
 print self.data
 self.gpio_action()
 def gpio_action(self):
 # do your gpio here
if __name__ == "__main__":
 HOST, PORT = "", 9999
 # Create the server, binding on port 9999
 server = SocketServer.TCPServer((HOST, PORT), MyTCPHandler)
 # Activate the server; this will keep running until you
 # interrupt the program with Ctrl-C
 server.serve_forever()

client.py

import socket
import sys
HOST, PORT = "<ip-to-server>", 9999
data = " ".join(sys.argv[1:])
# Create a socket (SOCK_STREAM means a TCP socket)
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
 # Connect to server and send data
 sock.connect((HOST, PORT))
 sock.sendall(data + "\n")
finally:
 sock.close()
print "Sent: {}".format(data)