I am using a Xbee3 (ZigBee protocol) and a XBee3 Cellular LTE-M/NB-IoT (set to use LET-M only) connected via UART as a gateway to the cloud for a Xbee3 ZigBee network. Since the nature of the gateway is to pass data to the cloud for multiple ZigBee end nodes, it can have multiple cloud pushes in a few second interval sometimes since each end node is setup point to point in a asynchronous network.
I can successfully get one end node to push on a 60second interval without issues, but when I try and add more end nodes I end up with either a timeout or socket leaks.
Question: For each end node cloud push, do I need to go through the socket sequence of connect, send, close or can I leave a socket open for a few minutes and send as many end node pushes as needed during the interval.
Below is a excerpt from my code where I currently connect, send, and close for each end node cloud push. Also, I had to exclude any response via "s.recv(100)" because it was taking ~65seconds for this to process even with excellent cell signal strength. This may be a host issue but either way it was causing an error so I removed it for testing.
def sendUbidotsData(device_label, token, body):
s = usocket.socket()
request = bytes(
'POST /api/v1.6/devices/%s HTTP/1.1\r\nHost: industrial.api.ubidots.com\r\nX-Auth-Token: %s\r\nContent-Type: application/json\r\nContent-Length: %s\r\n\r\n%s\r\n' % (
device_label, token, len(body), body), 'utf8')
I started with this tutorial (https://help.ubidots.com/en/articles/3713091-integrate-a-digi-xbee-cellular-3g-modem-to-ubidots-platform-using-micropython) to give you some background on where this came from.
Also, I have reference the Digi documentation here: https://www.digi.com/resources/documentation/digidocs/90002219/default.htm#tasks/t_set_timeout.htm%3FTocPath%3DSocket%2520examples%7C_____5 to try and figure it out as well with no luck.
I am new to the cellular side of Digi and I am trying to get a deeper understanding of how sockets work and best practices so any advice or suggestions would be appreciated.