Hi,
do need an inital pull from the value of the Mqtt In node, does not feed an value, until it changes
what could I do to get on Node-red start the value?
Thx
asked
initial pull from Mqtt variable ?
If you are on a recent firmware that now has FlashMQ you can send a keep alive and "ALL" values are refreshed. Do this after your connection to the broker.
thx for the info, which SW-Version do I need and which node would that be? thx
Hi @4711Austria
Store the value in a variable and if that variable is equal to null then manually set it to a static initial value.
like a trigger with initial setting on the check node, but this seems not to do the job, I do get an error about BMS lost, Voltage low -> there is no BMS active, but I need to poll the operational limits, otherwise the MP2 stop.
I imagine you'd need it done separate to check node. Guessing the check node only runs when a value is presented and instead you want a value if nothing has been sent yet.
I would add somewhere in your flow that the value is stored in a global variable or something similar then periodically check if that var is null and if it is send initial value to the output.
The other option is checking what's in your endpoint if that endpoint is null then send initial value.
actually I do that what you write, I think (without writing into a flow/global varibale)
but often on restart on node-red the cerbo shows BMS lost.
