fix squiggly start

2018-08-21 00:12:35 -04:00 · 2018-08-21 00:12:35 -04:00 · 76a7ff5aab
commit 76a7ff5aab
parent faaf7fad4d
1 changed files with 6 additions and 1 deletions
--- a/adafruit_pn532.py
+++ b/adafruit_pn532.py
@ -167,6 +167,11 @@ class PN532_I2C(object):
        self.debug = debug
        self._i2c = i2c_device.I2CDevice(i2c, _I2C_ADDRESS)
        self._irq = irq
+        try:
+            self.get_firmware_version() # first time often fails, try 2ce
+            return
+        except:
+            pass
        self.get_firmware_version()
        
    def _write_frame(self, data):