This release contains the same changes as v1.9.1.b1 and fixes the issue with the safe boot introduced there.

The full change log is:

• esp32: Fix an SSL / TLS non-blocking socket problem. Thanks to @peterson79 for this contribution!
• esp32: Remove all usages of unnamed unions.
• esp32: Make sure that the LoRaWAN Tx done event is always triggered after the Rx complete event.
• esp32: Add fileno method to the socket class.
• esp32: Also store the channels, the channel mask and the ADR counters in the LoRa NVRAM.
• esp32: Cast os.getfree() value to uint64_t to report correct sizes > 2GB. Thanks to @robert-hh for this!

Cheers,
Daniel

It's OK for Uplink messages with ABP node.
But with Downlink message (APB node) and join reponse (OTAA), I have this error for every incomming UDP message on the gateway from TTN.
--> Downlink timestamp error!, t_us: 4294606989

Thanks

1. ntp_sync most of the time not wrok (hang and never ending)
   i use for it old method

def getNTPTime(host = "pool.ntp.org"):
	port = 123
	buf = 1024
	address = socket.getaddrinfo(host,  port)[0][-1]
	msg = '\x1b' + 47 * '\0'
	msg = msg.encode()
	TIME1970 = 2208988800 # 1970-01-01 00:00:00

	# connect to server
	client = socket.socket(AF_INET, SOCK_DGRAM)
	client.setblocking(15)
	client.sendto(msg, address)
	msg, address = client.recvfrom(buf)
	t = struct.unpack("!12I", msg)[10]
	t -= TIME1970
	tuple_time = time.localtime(t)
	rtc.init((tuple_time))
	client.close()

but also tested if rtc.ntp_sync could help but same result :(

1. i2c not work - i2c buss error
   i init it with id=0 (i do not remember if in 1.7.2 it was hardware or software based)

bus=I2C(0, I2C.MASTER, baudrate=100000, pins=("P19", "P20"))

to test it what is going on i have updated board 3 times (all times sucessfully)
but with the same result

i have downgraded firmware back to 1.7.2.b1
all work without any problems - any hint?