Access point with `nmcli`

Question

I'm working on a Debian system:

# uname -a
Linux iot-gate-imx8 5.4.24-iot-gate-imx8-2.0 #1 SMP PREEMPT Thu Sep 3 10:30:00 IDT 2020 aarch64 GNU/Linux

I have a MODEM connection (which is active and working):

# nmcli con
NAME                UUID                                  TYPE      DEVICE
MODEM               425b609c-c893-4178-b3c3-88a8f2124b33  gsm       ttyUSB2
Wired connection 1  679f5ed8-61f1-3cc4-bb4f-376b4e841276  ethernet  --
Wired connection 2  417df684-700b-337c-8737-9e9ee07af12c  ethernet  --

I want to set up an access point using nmcli. I install dnsmasq:

# sudo apt install dnsmasq

then I set up my connection:

# nmcli con add type wifi ifname wlan0 mode ap con-name test ssid test ipv4.method shared

The command seems to be successful:

# nmcli con
NAME                UUID                                  TYPE      DEVICE
MODEM               425b609c-c893-4178-b3c3-88a8f2124b33  gsm       ttyUSB2
test                f4936a89-11cd-4057-b481-1f62b776194b  wifi      wlan0
Wired connection 1  679f5ed8-61f1-3cc4-bb4f-376b4e841276  ethernet  --
Wired connection 2  417df684-700b-337c-8737-9e9ee07af12c  ethernet  --

When I try to connect to the network test, I get some problems:

1. a Windows 10 machine manages to connect, but then it tells that there is no Internet (and I can't see any valid IP address assigned to the machine);
2. an Android machine cannot connect to test, it seems that it has a problem with the IP assignment.

=-=-= ADDED =-=-=

The command

journalctl -u NetworkManager | tail -30

returns:

Jan 11 12:08:51 <HOST> dnsmasq-dhcp[18301]: DHCPDISCOVER(wlan0) <MAC_ADDR_1>
Jan 11 12:08:51 <HOST> dnsmasq-dhcp[18301]: DHCPOFFER(wlan0) 192.168.0.43 <MAC_ADDR_1>
Jan 11 12:08:51 <HOST> dnsmasq-dhcp[18301]: DHCPDISCOVER(wlan0) <MAC_ADDR_1>
Jan 11 12:08:51 <HOST> dnsmasq-dhcp[18301]: DHCPOFFER(wlan0) 192.168.0.43 <MAC_ADDR_1>
Jan 11 12:08:51 <HOST> dnsmasq-dhcp[18301]: DHCPREQUEST(wlan0) 192.168.0.43 <MAC_ADDR_1>
Jan 11 12:08:51 <HOST> dnsmasq-dhcp[18301]: DHCPACK(wlan0) 192.168.0.43 <MAC_ADDR_1> <DEVICE_1>
Jan 11 12:09:53 <HOST> dnsmasq-dhcp[18301]: DHCPDISCOVER(wlan0) <MAC_ADDR_2>
Jan 11 12:09:53 <HOST> dnsmasq-dhcp[18301]: DHCPOFFER(wlan0) 192.168.0.229 <MAC_ADDR_2>
Jan 11 12:09:53 <HOST> dnsmasq-dhcp[18301]: DHCPDISCOVER(wlan0) <MAC_ADDR_2>
Jan 11 12:09:53 <HOST> dnsmasq-dhcp[18301]: DHCPOFFER(wlan0) 192.168.0.229 <MAC_ADDR_2>
Jan 11 12:09:54 <HOST> dnsmasq-dhcp[18301]: DHCPREQUEST(wlan0) 192.168.0.229 <MAC_ADDR_2>
Jan 11 12:09:54 <HOST> dnsmasq-dhcp[18301]: DHCPACK(wlan0) 192.168.0.229 <MAC_ADDR_2> <DEVICE_2>
Jan 11 12:11:44 <HOST> dnsmasq-dhcp[18301]: DHCPDISCOVER(wlan0) <MAC_ADDR_3>
Jan 11 12:11:44 <HOST> dnsmasq-dhcp[18301]: DHCPOFFER(wlan0) 192.168.0.217 <MAC_ADDR_3>
Jan 11 12:11:44 <HOST> dnsmasq-dhcp[18301]: DHCPDISCOVER(wlan0) <MAC_ADDR_3>
Jan 11 12:11:44 <HOST> dnsmasq-dhcp[18301]: DHCPOFFER(wlan0) 192.168.0.217 <MAC_ADDR_3>
Jan 11 12:11:44 <HOST> dnsmasq-dhcp[18301]: DHCPDISCOVER(wlan0) <MAC_ADDR_3>
Jan 11 12:11:44 <HOST> dnsmasq-dhcp[18301]: DHCPOFFER(wlan0) 192.168.0.217 <MAC_ADDR_3>
Jan 11 12:11:45 <HOST> dnsmasq-dhcp[18301]: DHCPREQUEST(wlan0) 192.168.0.217 <MAC_ADDR_3>
Jan 11 12:11:45 <HOST> dnsmasq-dhcp[18301]: DHCPACK(wlan0) 192.168.0.217 <MAC_ADDR_3>

=-=-==-=-=-=-=-=-

Could anyone provide some insight, please? Thanks in advance.

Answer 1

does the journalctl show anything interesting?