Shelly 1PM as a 1 wall switch for 1 light : not working

Hi,

I want to switch to separate lights with only 1 switch.

Currently i have 1 switch + 1 light and in another place 1 switch + 1 light.

My idea is to replace the current switch in the 1st place with 1 Shelly Wall Switch + 1PM to manage the linked light, and replace the other switch with a 1PM.

The 1 st 1PM when activated by the Wall Switch, first light ON, will command the second switch to power on the second light.

My question is that in the 1st current wall switch i have 2 wires, its the arrival of the phase L on the switch and the other side going to the light.

On the below diagram they are the 1 and 2

But i don't have the N labelled as 3 here below....

So how to connect the Shelly and the WS in that case ?

oookkkk......... thanks for the prompt answer...

So i will order two 1L, shame because i own 2 1PM since months and can't use up to now

And my lights are more than 20W... but... as i will change them for led's lamps i will come below 20w i guess... so i should order also the bypass..

edit : or i will try to insert a 3rd wire up to the lamp in order to bring the neutral... maybe..

so i succeeded to add a wire to bring N to the Shelly 1PM

WS is connected to 1PM

I now discover that the WS is one time switch, 1 press = ON, 1 release = OFF, so the light doesn't stay ON, i guess i have to describe some scenario in order to have 1 press = ON, next press = OFF etc...

But i cannot add this 1PM in the Shelly app and any group.

I can find its Wifi, i follow the process but when i click done to add it, i have a red message saying

other detail, to reset it the doc says ON/OFF on the Shelly, then in the next 1 minute press 5 time on the reset button ===> NOT WORKING AT ALL

but if i press 30sec on the reste button, then it reboot and reste and generate again its wifi !!!!!

edit :

now i can add it, at least i can go the end of the process with a message saying added ok, but then i cannot find it anywhere in the Shelly app, and it disappear from the discovered devices, so i need to reset it and restart, but same each time.

not in the only group i have, not the IP on my LAN with a scanner, nowhere....

i don't understand...

really a nightmare !

ok, now it is connected to my wifi

i was able to do it by resetting it, connecting to its wifi, then 192.168.33.1, but i had laso to understand that the wifi settings mentionned in the fields ssid and pwd had to be rewritten because they didn't had any mreaning even if the looks correct.

so by retyping them it connected

then i did a firmware upgrade

now i see it in one group, ok

but the WS doenst work, nor the switch itself, it never switch my light on, at the start right after wiring it, i was able to get light by pressing the WS, but light was not staying ON, each press = ON, when released = OFF

so i guess my wiring is correct

but now, nothing... i tried different settings for power on default, button type etc... nothing...

i rebooted it.... nothing...

Any help or suggestions will be welcomed