Pn532 upgrades (#1302)

* Move pn532 -> pn532_spi
Add pn532_i2c

* Update i2c address

* Always wait for ready byte before reading

* Generalise the pn532 a bit more so less code in i2c and spi implementations

* clang

* Add pn532_i2c to test1

* Try to get setup working

* Fixes

* More updates

* Command consts

* A few upgrades

* Change text back to include 'new'

* Fix data reading

esphome/components/pn532_i2c/__init__.py

@@ -0,0 +1,21 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import i2c, pn532
+from esphome.const import CONF_ID
+
+AUTO_LOAD = ['pn532']
+CODEOWNERS = ['@OttoWinter', '@jesserockz']
+DEPENDENCIES = ['i2c']
+
+pn532_i2c_ns = cg.esphome_ns.namespace('pn532_i2c')
+PN532I2C = pn532_i2c_ns.class_('PN532I2C', pn532.PN532, i2c.I2CDevice)
+
+CONFIG_SCHEMA = cv.All(pn532.PN532_SCHEMA.extend({
+    cv.GenerateID(): cv.declare_id(PN532I2C),
+}).extend(i2c.i2c_device_schema(0x24)))
+
+
+def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    yield pn532.setup_pn532(var, config)
+    yield i2c.register_i2c_device(var, config)