ESP8266 and MQTT issue

[davefes]

Posting for someone else at https://forum.micropython.org/viewtopic.php?f=16&t=11635&p=63405#p63405

Again I did the following:

import upip #No Problem upip install('micropython-umqtt.simple') Resulted in a syntax error.

Should have responded with: Installing to: /lib/ Warning: micropython.org SSL certificate is not validated Installing micropython-umqtt.simple 1.3.4 from https://micropython.org/pi/umqtt.simple ... 3.4.tar.gz

NOTE: The ESP-01S was connected to my WiFi network.

He seems to be using the latest 1M GENERIC ESP8266 image.

Thanks, Dave

[mmliam]

I'm the one for which davefes posted issue #11; just created an account. Here's some additional information: This is the version that I don't have any issues with; it installs MQTT into the ESP-01S LIB esp8266-1m-20210902-v1.17

This is the version that failed: 20210903_espnow-g20-v1.17 Actual file name: firmware-esp8266-GENERIC_1M (581KB)

BTW: There is another slightly larger bin-file in the same folder that I haven't tried: firmware-esp8266-GENERIC (615KB)

[mmliam]

FOUND THE PROBLEM: Dumb programming: Issued upip install.... instead of upip.install...

New Issue, see below.

[davefes]

Not quite there:

With build [firmware-esp8266-GENERIC_1M (581KB)] re-installed, I am now going to try specifying a fixed channel to see if that speeds re-connection.

UPDATE: Tried issuing the fixed channel assignment [sta_if.config(channel=11)]

Resulted in the same error as the standard build: File "main.py", line 18, in OSError: AP required

MicroPython v1.17-12-g26e539a1b on 2021-09-03; ESP module (1M) with ESP8266 Type "help()" for more information.

[mmliam]

re: https://micropython-glenn20.readthedocs.io/en/latest/library/espnow.html#espnow-and-wifi-operation

EXCERPT from EXAMPLE 2: `e = espnow.ESPNow() e.init()

w0 = network.WLAN(network.STA_IF) w0.active(True) # Set channel will fail unless Active w0.config(channel=6) w0.connect('myssid', 'myppassword') ` This code excerpt suggests that with ESPNow it should be possible to set a fixed WiFi channel for the Station-mode. As stated in previous post this throws the error "OSError: AP required". Is this an error in ESPNow or the referenced micropython webpage?

[glenn20]

As noted in Issue #12, the esp8266 api does not permit setting the channel of the STA_IF interface on the ESP8266.

However, you can set it by setting the channel on the AP_IF interface an then turning off the AP_IF. The STA_IF and AP_IF always run on the same channel:

import network

w0, w1 = (network.WLAN(i) for i in (network.STA_IF, network.AP_IF))
w0.active(True)
w0.disconnect() # Because esp8266 automatically reconnects to last AP
w1.active(True) # This turns on the Access Point
w1.config(channel=6) # STA and AP lways use the same channel
w1.active(False) # Turn off the Access Point