set default baudrate to 5MHz -- rename simpletest to rfm9x_simpletest

Author: jerryneedell

README.rst

@@ -29,9 +29,9 @@ This is easily achieved by downloading
 Usage Example
 =============
 
-See examples/simpletest.py for a demo of the usage.
-Note: the default baudrate for the SPI is 10000000 (10MHz). This works well when you are using a board with 
-the radio module built in (FeatherM0 RFM9x) or with an RFM9x FeatherWing mounted directly to a feather board.
+See examples/rfm9x_simpletest.py for a demo of the usage.
+Note: the default baudrate for the SPI is 50000000 (5MHz). The maximum setting is 10Mhz but 
+transmission errors have been observed expecially when using breakout boards.
 For breakout boards or other configurations where the boards are separated, it may be necessary to reduce
 the baudrate for reliable data transmission.
 The baud rate may be specified as an keyword parameter when initializing the board.

adafruit_rfm9x.py

@@ -27,7 +27,7 @@
 adapted from the Radiohead library RF95 code from:
 http: www.airspayce.com/mikem/arduino/RadioHead/
 
-* Author(s): Tony DiCola
+* Author(s): Tony DiCola, Jerry Needell
 """
 import time
 import digitalio
@@ -334,9 +334,10 @@ def __set__(self, obj, val):
     rx_done = _RegisterBits(_RH_RF95_REG_12_IRQ_FLAGS, offset=6, bits=1)
 
     def __init__(self, spi, cs, reset, frequency, *, preamble_length=8,
-                 high_power=True, baudrate=1000000):
+                 high_power=True, baudrate=5000000):
         self.high_power = high_power
         # Device support SPI mode 0 (polarity & phase = 0) up to a max of 10mhz.
+        # Set Default Baudrate to 5MHz to avoid problems
         self._device = spi_device.SPIDevice(spi, cs, baudrate=baudrate,
                                             polarity=0, phase=0)
         # Setup reset as a digital input (default state for reset line according
@@ -361,8 +362,9 @@ def __init__(self, spi, cs, reset, frequency, *, preamble_length=8,
                 raise RuntimeError('Failed to configure radio for LoRa mode, check wiring!')
         except OSError:
             raise RuntimeError('Failed to communicate with radio, check wiring!')
-        # clear default setting ofr access to LF registers
-        self.low_frequency_mode = 0
+        # clear default setting for access to LF registers if frquency > 525MHz
+        if frequency > 525:
+            self.low_frequency_mode = 0
         # Setup entire 256 byte FIFO
         self._write_u8(_RH_RF95_REG_0E_FIFO_TX_BASE_ADDR, 0x00)
         self._write_u8(_RH_RF95_REG_0F_FIFO_RX_BASE_ADDR, 0x00)
@@ -532,10 +534,11 @@ def rssi(self):
         # Remember in LoRa mode the payload register changes function to RSSI!
         return self._read_u8(_RH_RF95_REG_1A_PKT_RSSI_VALUE) - 137
 
-    def send(self, data, timeout_s=1.):
+    def send(self, data, timeout_s=2.):
         """Send a string of data using the transmitter.  You can only send 252
         bytes at a time (limited by chip's FIFO size and appended headers). Note
         this appends a 4 byte header to be compatible with the RadioHead library.
+        The timeout is just to prevent a hang (arbitrarily set to 2 Seconds).
         """
         # Disable pylint warning to not use length as a check for zero.
         # This is a puzzling warning as the below code is clearly the most