HTTPS Get request with Micropython on a ESP8266 failing - esp8266

Question

apologies upfront for being a complete SSL noob.
I´m starting to work with Micropython and ran into a problem that with HHTPS requests. With the below code on an ESP8266MOD 12F I try to get some information from a test API, but all I get is an error.
import urequests as requests
import network
WIFI_SSID = "***********"
WIFI_PW = "************"
def connect_wifi(wlan, ssid, password):
if not wlan.isconnected():
print("\nConnecting...")
wlan.connect(ssid, password)
while not wlan.isconnected():
pass
print("Wifi connected")
wlan = network.WLAN(network.STA_IF)
wlan.active(True)
connect_wifi(wlan, WIFI_SSID, WIFI_PW)
if not wlan.isconnected():
connect_wifi(wlan, WIFI_SSID, WIFI_PW)
else:
url = "http://api.coindesk.com/v1/bpi/currentprice.json"
r = requests.get(url)
print(r.text)
The error I get is:
Traceback (most recent call last):
File "<stdin>", line 25, in <module>
File "urequests.py", line 116, in get
File "urequests.py", line 62, in request
OSError: [Errno 107] ENOTCONN
My original attempt was to get to the Telelgram Bot API so I can send Telegram messages from my IoT devices. If I use an URL for the Telelgram API in the form of
url = "https://api.telegram.org/bot*****:***********/sendMessage?text=Klingel&chat_id=*****"
I get a different error which is
Traceback (most recent call last):
File "<stdin>", line 25, in <module>
File "urequests.py", line 116, in get
File "urequests.py", line 60, in request
OSError: [Errno 103] ECONNABORTED
When changing the Coindesk URL to HTTP, everything works fine. Unfortunately the Telegram API does not accept HTTP requests.
I tried several different urequests libraries as the on e isntalles via pip seemed to be a bit dated. The one I´m currently trying I got from github here. My ESP is running the current firmware esp8266-20220618-v1.19.1 from micropython.org.
I searched the internet for 4 days now and did not find anything that helped me. Nevertheless there seem to be quite some people to managed to use SSL in this configuration. As I am a true beginner in this whole topic, any help would be appreciated.
Thanks
Marcus

Answer 1

After some deeper digging I found out that the problem was caused by my Adguard DNS server which blocked the Telegram API. I did not see it on my laptop because it used a different DNS server. Now that I fixed the DNS issue, I´m getting OSError -40 which seems to be a common problem with the axTLS library used in the ESP8266. At least that makes sense to me now.
Thanks Andy for the quick reply.,