Merge pull request adafruit#1282 from dhalbert/ble-host-computer

ble_eval examples

Author: dhalbert

BLE_Host_Computer/ble_eval_client.py

@@ -0,0 +1,27 @@
+# Connect to an "eval()" service over BLE UART.
+
+from adafruit_ble import BLERadio
+from adafruit_ble.advertising.standard import ProvideServicesAdvertisement
+from adafruit_ble.services.nordic import UARTService
+
+ble = BLERadio()
+
+uart_connection = None
+
+while True:
+    if not uart_connection:
+        print("Trying to connect...")
+        for adv in ble.start_scan(ProvideServicesAdvertisement):
+            if UARTService in adv.services:
+                uart_connection = ble.connect(adv)
+                print("Connected")
+                break
+        ble.stop_scan()
+
+    if uart_connection and uart_connection.connected:
+        uart_service = uart_connection[UARTService]
+        while uart_connection.connected:
+            s = input("Eval: ")
+            uart_service.write(s.encode("utf-8"))
+            uart_service.write(b'\n')
+            print(uart_service.readline().decode("utf-8"))

BLE_Host_Computer/ble_eval_server.py

@@ -0,0 +1,24 @@
+# Provide an "eval()" service over BLE UART.
+
+from adafruit_ble import BLERadio
+from adafruit_ble.advertising.standard import ProvideServicesAdvertisement
+from adafruit_ble.services.nordic import UARTService
+
+ble = BLERadio()
+uart = UARTService()
+advertisement = ProvideServicesAdvertisement(uart)
+
+while True:
+    ble.start_advertising(advertisement)
+    print("Waiting to connect")
+    while not ble.connected:
+        pass
+    print("Connected")
+    while ble.connected:
+        s = uart.readline()
+        if s:
+            try:
+                result = str(eval(s))
+            except Exception as e:
+                result = repr(e)
+            uart.write(result.encode("utf-8"))