Need to monitor NodeMcu power and use deep sleep mode

Made another firmware build at nodemcu-build.com.

You successfully commissioned a NodeMCU custom build from the master branch. You selected the following 11 modules: adc dht ds18b20 file gpio mqtt net node tmr uart wifi.

I included "adc" this time so I can try the following statement in my function pubEvent()
              print( adc.readvdd33() )

Found building with adc causes the code to crash at
    tmr.alarm(1, 1000, 1, function()

So switched to non-master build:
You successfully commissioned a NodeMCU custom build from the 1.5.4.1-final branch. You selected the following 10 modules: adc dht file gpio mqtt net node tmr uart wifi.

That fixes it. Maybe. But cannot connect over Wifi now...

Also I can flash firmware and do Lua programming using ESPlorer using just the microUSB connector. Great! No need for 3-wire USB to serial connection :)

Nope "adc" definitely seems to upset "wifi". So giving up.

But this code worked:
if adc.force_init_mode(adc.INIT_VDD33) then node.restart() return -- don't bother continuing, the restart is scheduled end print("System voltage (mV):", adc.readvdd33(0))


By producing..
NodeMCU custom build by frightanic.com
branch: 1.5.4.1-final
commit: b9436bdfa452c098d5cb42a352ca124c80b91b25
SSL: false
modules: adc,dht,file,gpio,mqtt,net,node,tmr,uart,wifi
 build created on 2019-04-05 21:10
 powered by Lua 5.1.4 on SDK 1.5.4.1(39cb9a32)
NodeMcu temperature monitor v0.4 05-Apr-19
System voltage (mV): 3014
Configuring WIFI..
nil
> IP unavaiable, Waiting...
IP unavaiable, Waiting...
IP unavaiable, Waiting...
IP unavaiable, Waiting...

Was only nice to have though later voltage monitoring will need it?

Will try one more "dev" firmware build

You successfully commissioned a NodeMCU custom build from the dev branch. You selected the following 11 modules: adc dht file gpio mqtt net node tmr uart wifi.

Fails to build :(

So on to deep sleep mode next :) I will try this first

https://odd-one-out.serek.eu/projects/esp8266-nodemcu-dht22-custom-modules-firmware/