Merge pull request #148 from emfcamp/sammachin-gprs

Sammachin gprs

hologram_demo/main.py

@@ -0,0 +1,51 @@
+"""This app connects to the Hologram service via GPRS  displays recieved data on the screen and sets the neopixles"""
+
+___title___        = "Hologram Demo"
+___license___      = "MIT"	
+___dependencies___ = ["app", "sim800"]
+___categories___   = ["EMF", "System"]
+___bootstrapped___ = False
+
+#import ugfx, os, time, sleep, app, sim800
+
+import ugfx, app, sim800
+import os
+from tilda import Buttons
+from time import sleep
+from machine import Neopix
+
+
+n = Neopix()
+
+ugfx.init()
+ugfx.clear()
+ugfx.set_default_font(ugfx.FONT_FIXED)
+
+
+def callback(data):
+    payload=data.decode("utf-8") 
+    ugfx.Label(5, 100, 240, 15, payload)
+    colour = int(payload)
+    n.display([colour,colour])
+
+print('Launching Hologram Demo')
+ugfx.Label(5, 20, 240, 15, "Starting....")
+sim800.setup_gprs()
+ugfx.Label(5, 20, 240, 15, "GPRS Ready")
+sim800.connect_gprs('hologram')
+ugfx.Label(5, 40, 240, 15, "GPRS Connected")
+sim800.start_server(4010, callback)
+ugfx.Label(5, 60, 240, 15, "Server Started")
+
+
+ugfx.Label(5, 300, 240, 15, "** Hold A or B or MENU to exit **")
+
+
+while (not Buttons.is_pressed(Buttons.BTN_A)) and (not Buttons.is_pressed(Buttons.BTN_B)) and (not Buttons.is_pressed(Buttons.BTN_Menu)):
+    sleep(2)
+
+ugfx.clear()
+ugfx.Label(5, 20, 240, 15, "Stopping....")
+sim800.stop_server()
+sim800.stop_gprs()
+app.restart_to_default()	

lib/sim800.py

@@ -25,6 +25,7 @@
 
 # A list of callback functions
 callbacks = []
+server_callback = None
 
 # Globals for remembering callback data
 clip = ""
@@ -105,6 +106,12 @@ def processcallbacks(line):
     # Check for Bluetooth pairing request
     if line.startswith("+BTPAIRING:"):
         btpairing = line[11:].strip()
+    # Handle TCP Server Data
+    if line.startswith("+RECEIVE"):
+        dlen = int(line.split(",")[2].rstrip(":"))+1
+        payload = uart.read(dlen)
+        if server_callback:
+             micropython.schedule(server_callback, payload[1:])
     # Check for app callbacks
     for entry in callbacks:
         if line.startswith(entry[0]):
@@ -847,6 +854,28 @@ def callbuttonpressed_internal(nullparam=None):
 def endbuttonpressed_internal(nullparam=None):
     hangup()
 
+#GPRS and TCP server functions
+
+def setup_gprs():
+    command("AT+CIPSHUT", response_timeout=60000, custom_endofdata="SHUT OK")
+    command("AT+CGATT?", response_timeout=10000)
+    command("AT+CIPMUX=1", response_timeout=10000)
+
+def connect_gprs(apn):
+    command("AT+CSTT=\""+apn+"\"", response_timeout=10000)
+    command("AT+CIICR", response_timeout=10000)
+    command("AT+CIFSR")
+
+def stop_gprs():
+    command("AT+CIPSHUT", response_timeout=60000, custom_endofdata="SHUT OK")
+
+def start_server(port, callback):
+    global server_callback
+    server_callback = callback
+    command("AT+CIPSERVER=1,"+str(port), response_timeout=10000)
+
+def stop_server():
+    command("AT+CIPSERVER=0", response_timeout=10000)
 
 # Startup...