Fix incorrect attribute name, rm certificates.py

adafruit_aws_iot.py

@@ -79,7 +79,7 @@ def __init__(self, mmqttclient, keep_alive=30):
         # Shadow-interaction topic
         self.shadow_topic = "$aws/things/{}/shadow".format(self.cid)
         # Ensure set_certificate and set_private_key were run from ESP32SPI
-        assert self.client.wifi.esp.set_psk and self.client.wifi.esp.set_cert, "Certificate \
+        assert self.client.wifi.esp.set_psk and self.client.wifi.esp.set_crt, "Certificate \
             and private key must be set to your AWS Device Cert and Private Key."
         # keep_alive timer must be between 30 <= keep alive interval <= 1200 seconds
         # https://docs.aws.amazon.com/general/latest/gr/aws_service_limits.html

examples/aws_iot_shadows.py

@@ -18,12 +18,20 @@
     print("WiFi secrets are kept in secrets.py, please add them there!")
     raise
 
-# Get device certificate and private key from a certificates.py file
+# Get device certificate
 try:
-    from certificates import DEVICE_CERT, DEVICE_KEY
+    with open("aws_cert.pem.crt", "rb") as f:
+        DEVICE_CERT = f.read()
 except ImportError:
-    print("Certificate and private key data is kept in certificates.py, \
-           please add them there!")
+    print("Certificate (aws_cert.pem.crt) not found on CIRCUITPY filesystem.")
+    raise
+
+# Get device private key
+try:
+    with open("private.pem.key", "rb") as f:
+        DEVICE_KEY = f.read()
+except ImportError:
+    print("Certificate (private.pem.key) not found on CIRCUITPY filesystem.")
     raise
 
 # If you are using a board with pre-defined ESP32 Pins:

examples/aws_iot_simpletest.py

@@ -18,12 +18,20 @@
     print("WiFi secrets are kept in secrets.py, please add them there!")
     raise
 
-# Get device certificate and private key from a certificates.py file
+# Get device certificate
 try:
-    from certificates import DEVICE_CERT, DEVICE_KEY
+    with open("aws_cert.pem.crt", "rb") as f:
+        DEVICE_CERT = f.read()
 except ImportError:
-    print("Certificate and private key data is kept in certificates.py, \
-           please add them there!")
+    print("Certificate (aws_cert.pem.crt) not found on CIRCUITPY filesystem.")
+    raise
+
+# Get device private key
+try:
+    with open("private.pem.key", "rb") as f:
+        DEVICE_KEY = f.read()
+except ImportError:
+    print("Certificate (private.pem.key) not found on CIRCUITPY filesystem.")
     raise
 
 # If you are using a board with pre-defined ESP32 Pins: