How do I pair a frsky receiver to a Radiomaster Tx12?

[balmy dagger]

and youtube is not helping

https://www.getfpv.com/micro-quadcopters/micro-rtf-bnf/happymodel-cine8-85mm-brushless-cinewhoop-diy-kit-w-caddx-ant-nano-fpv-camera.html

[devout elbow]

Which TX12 variant did you get?

and what receiver is in the drone?

oh, SPI FRSKY, I see now

still need to know the TX12 variant.

[balmy dagger]

https://www.getfpv.com/radiomaster-tx12-multi-protocol-opentx-2-4ghz-rc-transmitter1.html

[devout elbow]

okay, so the original V1

There are multiple protocols that will work

Do you have Betaflight Configurator? @balmy dagger

[balmy dagger]

No

[devout elbow]

You sort of need that to configure the drone

[balmy dagger]

what is it

a software?

[devout elbow]

https://github.com/betaflight/betaflight-configurator/releases/latest

downloads are at the very bottom

pick the one that's correct for your OS

The flight controller of the drone runs Betaflight

[devout elbow]

this program lets you configure it via USB

[balmy dagger]

is this it?

[devout elbow]

yeah, but that's outdated

I recommend updating it to the latest one

[balmy dagger]

Ok

this looks right

[devout elbow]

Just make sure that it's 10.8

[balmy dagger]

yep

I have to go for now ill be back later

but thanks for the help cya

[devout elbow]

tag me when you come back

Possible protocol combinations:
Drone - Radio
FRSKY_D - FrSkyD (or FrSkyX) D8
FRSKY_X - FrSkyX D16
SFHSS - Futaba S-FHSS
Redpine - Redpine

Drone side is configured in Betaflight Configurator - Receiver tab.
Radio side is configured in Model Setup (MDL button, PAGE>), Internal RF section (scroll down), Mode

I'd recommend SFHSS, as it's pretty smooth and supported by both sides.

[balmy dagger]

@devout elbow Im back

[devout elbow]

that's 1:25AM for me unfortunately xD

[balmy dagger]

I went to bed early lol

are you available?

[devout elbow]

sup

[balmy dagger]

alright

so how do I do this

I have the software downloaded

[devout elbow]

let's start with the radio

[balmy dagger]

ok

[devout elbow]

on your radio, from the main screen, press MDL

that should get you into MODEL SELECTION

[balmy dagger]

yep

[devout elbow]

press PAGE>

[balmy dagger]

alr

[devout elbow]

now you should be in MODEL SETUP

[balmy dagger]

in it

[devout elbow]

scroll down until you run across Internal RF

[balmy dagger]

ok I see it

says mode multi

[devout elbow]

send a pic

[balmy dagger]

and type frsky D

[devout elbow]

ok what does it say in Status?

[balmy dagger]

V1.3.2.82 AETR

[devout elbow]

ok good

There are multiple protocols in which a FRSKY SPI receiver will bind

if you want smooth responsive controls, then SFHSS is a good idea

not sure how the range compares to FRSKY D8

[balmy dagger]

it says subtype D8

[devout elbow]

Let's start with SFHSS because frankly I just had more luck with that

Set it to Futaba S-FHSS

[balmy dagger]

I dont see an option for that

would it be under protocol or subtype

[devout elbow]

type should be Futaba

not sure if it will be directly Futaba SFHSS or with some subtype thing

[balmy dagger]

ok got it

and the subtype set itself to sfhaa

sfhss

[devout elbow]

ok

now, you have Betaflight Configurator?

Start it up

and then connect the drone via USB

[balmy dagger]

this is what I see

[devout elbow]

good

connect the drone via USB

with that you should hopefully see it come up in the top right

where "Manual Selection" currently sits

[balmy dagger]

do I need the battery?

[devout elbow]

no

[balmy dagger]

damn it

the micro usb is inside the drone

i might have to find a smller cable or open it

[devout elbow]

hmm

sometimes the drone comes with a weird USB extension

[balmy dagger]

bam

removed a motor

we good

ok the drone is beeping

and I see a picture of a drone on the flight controller

[devout elbow]

ok great

let's start by doing something smart

make the window larger so that you can see the labels of the tabs on the left

[balmy dagger]

done

[devout elbow]

go to CLI tab

in there you can send commands to the flight controller directly

[balmy dagger]

im on it

[devout elbow]

at the bottom, enter this command:
diff all

send it by pressing enter

it should print out a wall of text

Then, press Save to file

and save it somewhere where you won't lose it

that's your backup of the drone's configuration as it came from the factory

[balmy dagger]

done

saved

[devout elbow]

If you ever need to restore it, you just use the Load from file button

[balmy dagger]

I see

[devout elbow]

These backups can save your bacon 😉

moving on

when you leave the CLI tab, the drone will reboot

that's normal

it will disconnect you

Go into Receiver tab

and send a screenshot

[balmy dagger]

it reset

and im on the receiver tab

[devout elbow]

I just want a screenshot so I can better navigate you

[devout elbow]

that's not the receiver tab 😄

[balmy dagger]

hehe

[devout elbow]

Okay so

on the right side, "Receiver"
change FRSKY_D to SFHSS

and then press Save

[balmy dagger]

it rebooted

[devout elbow]

that's normal

just a warning

if you leave a tab without saving

you will lose the changes

[balmy dagger]

oh ok

[devout elbow]

in CLI, saving is done by sending the save command

once it boots, go back to Receiver tab

on your radio, in Internal RF, select the [BIND] option

don't click it yet

[balmy dagger]

do I need to go to CFI?

[devout elbow]

no

[balmy dagger]

ok

[devout elbow]

I said Receiver tab

in Receiver tab, click the Bind Receiver button at the bottom

after you do that, click [BIND] on the radio

[balmy dagger]

the drone is beeping loud

is it bnd

on the radio

[devout elbow]

yeah

some radio screeens are too small

[balmy dagger]

mode

[devout elbow]

so they shorten it to [BND]

[devout elbow]

?

[balmy dagger]

theres options for stuff like

telem

on or off

[devout elbow]

that's all?

I'd do telem off, SPI receivers often hate sending telemetry back

[balmy dagger]

1-8 telem on and off

and 9-16

telem on or off

[devout elbow]

that sounds like FRSKY options to me

do you have the radio set to Futaba SFHSS?

didn't know that Futaba had these options as well

well, what do I know

1-8 Telem OFF in that case

[balmy dagger]

nvm it went back

but i changed it

now the radio is beeping

i pressed bind

[devout elbow]

once it stops beeping

check if you see stick movements in BF Receiver tab

[balmy dagger]

its still beeping

[devout elbow]

hmm, odd, I'm used to it beeping for like 3s

in that case just press exit or return or whatever button your radio has for that

[balmy dagger]

ok

[devout elbow]

sooooOOOO?

[balmy dagger]

i went back

[devout elbow]

?

[balmy dagger]

where is that lol

oh

it works]

[devout elbow]

do these move?

when you move the raido sticsk?

[balmy dagger]

the drone is doing flips on screen

yeah the numbers change

when i move the sticks

[devout elbow]

send a new screenshot

with the throttle all the way down

[devout elbow]

okay the channel map is wrong

and channel centers too

annoying

oh well

change this to AETR1234

and save

and then check if the sticks now match up with their names in BF

[balmy dagger]

im not even moving the sticks

and the numbers r jumping

[devout elbow]

?

[balmy dagger]

its going up and down

[devout elbow]

ugh

that shit again

how close is the radio to the drone?

[balmy dagger]

right beside

about 10 inches

[devout elbow]

see if moving it a bit further away fixes the on/off behaviour

[balmy dagger]

moved it 5 feet over

same thing

[devout elbow]

hmmmm

sometimes this kind of misbehaviour happens when connected to USB

but not when running normally..

idk

[balmy dagger]

hmm

should we try

to fly it

[devout elbow]

For the sake of keeping this short, I'd try to switch it to FRSKY_D (and FRSKY D8 on the radio)
it's an inferior protocol, but worth a shot

[balmy dagger]

numbers r still now

[devout elbow]

hm?

hmm

nvm then

[balmy dagger]

the drone is spinning very slow in a diagonal direction

hard to explain

[devout elbow]

I get it, don't worry

do me a favor

and send a screenshot with all of the sticks moved down left

or just tell me if all of the values go to 2020

[balmy dagger]

its spinning crazy

[devout elbow]

okay, that's not difficult to deal with then

do any of the switches change the AUX1-4 values?

[balmy dagger]

when I move the sticks no

BUT

its doing the on off thing again

[devout elbow]

we'll see

I'll show you how to make a backup setup for FRSKY_D mode instead

but that usually suffers this issue more lol

anyway

First we have to fix one mildly annoying thing

all of your channels are inverted

or maybe

no, let's do the switches first.

On your radio, go into the Mixes page

[balmy dagger]

where is that

[devout elbow]

from Model setup, PAGE>

two times iirc

maybe more

[balmy dagger]

ok

founs it

found

[devout elbow]

is there anything assigned on CH5+?

[balmy dagger]

says 100 SE

in the downward position

I believe

[devout elbow]

can you send a photo?

so that CH5-8 are visible

[devout elbow]

I mean

you had one job

xD

[balmy dagger]

-_-

[devout elbow]

I'm not seeing CH8

just write it

[devout elbow]

this is where the B and C come from in SB and SC

the E and F are on the back I guess

[balmy dagger]

67yeah

yeah

[devout elbow]

when you click those switches, you don't see any values change in BF Receiver tab?

[balmy dagger]

yeah

c changes aux 3

and the drones wild beeping stopped

[devout elbow]

okay, good, so that works

you can keep the switch in the shut up position for now

<PAGE to MODELSEL

[balmy dagger]

ok

on it

[devout elbow]

There, scroll onto the currently selected model (should have like a * at the start of its name or something)

[balmy dagger]

yeah

[devout elbow]

then, long-click on it
and it should allow you to duplicate or copy it

[balmy dagger]

copy

I see an option

[devout elbow]

copy the model

[balmy dagger]

ok

[devout elbow]

you're doing this to have an unmolested backup

[balmy dagger]

its in slot 6

[devout elbow]

ok, go back to the original model that you were working on (if the selected model changed)

then, PAGE> to OUTPUTS

[balmy dagger]

ok

[devout elbow]

once in OUTPUTS, you should see something like 0.0 -100 - 100

for each channel

[balmy dagger]

yep

[devout elbow]

start with CH1

edit it

[balmy dagger]

alr

I hit edit

[devout elbow]

I very rarely do this from memory

so I need a photo

[devout elbow]

Does Direction allow you to change it to something like inverted?

[balmy dagger]

yeah

INV

[devout elbow]

ok, do that on all channels up to 8

[balmy dagger]

ok

[devout elbow]

then check your stick values in BF

down left should be ~1000
up right should be ~2000

[balmy dagger]

is this where it should be?

changed them all

to INV

[devout elbow]

this is where you check

[balmy dagger]

its changing fast again

[devout elbow]

I need you to check that bottom/left for the sticks means the lowest value

[devout elbow]

the drone thinks that it's losing signal for whatever reason

ignore it for now

let's first set it up

[balmy dagger]

I cant tell lol

[devout elbow]

?

[balmy dagger]

the numbers r changing fast

thats the lowest I get while its changing

[devout elbow]

I don't care how low it goes

I only care that it goes in the correct direction

bottom left should give you small values

[balmy dagger]

what do u mean bottom left

[devout elbow]

top/right should give you high values

sticks

[balmy dagger]

for the sticks?

ok

yeah that sounds about right

[devout elbow]

okay

that means that the INV thing works as expected

it reversed the channels

because they were backwards before

now, the center of the channels is still wrong

1520 instead of 1500

pick a channel, like CH1 for example

and change its subtrim value

until it gets to 1500

(when the stick is centered ofc)

[balmy dagger]

ok

nothing changes

when I edit it

[devout elbow]

what if you exit the editor?

[balmy dagger]

nope

still the same

should I edit another channel?

[devout elbow]

you can

but that's hella odd

[balmy dagger]

man im getting tired of this crap

i need a a break

wanna come back to this later?

[devout elbow]

I'll be asleep

anyway, the backup option

which should need less tweaking

do you mind setting that up quickly?

I dislike FRSKY_D but it might be easier

[balmy dagger]

how

[devout elbow]

Switch to the copied model

that you made earlier

affter you switch, go into Model Setup

Internal RF

set it to FrSky D8

on the drone, set it to FRSKY_D, save

and then bind on the drone first, on the radio second

[balmy dagger]

cant seem to find it

frsky D

[devout elbow]

you had it before

FrSkyD or FrSkyX

subtype D8

[balmy dagger]

I found Frsky

doesd that work

[devout elbow]

did you find D8?

[balmy dagger]

yeah

[devout elbow]

send a pic

just for sanity's sake 😄

[devout elbow]

are you in Internal RF?

I bet that you're not

I guess that you scrolled past it all the way into External RF

[balmy dagger]

ok found it lol

I wasnt on it

frsky D

and D8

[devout elbow]

make sure to set External RF to OFF btw

you don't want there to be power in the module bay for no reason

[balmy dagger]

done

[devout elbow]

okay

now, the binding

on the drone, set FRSKY_D instead of SFHSS

save

then Bind on the drone, then [BND] on the radio

then exit from [BND] on the radio and check for stick movement

[balmy dagger]

hmm

wait

so

internal rf must be frsky d

?

which it is

and D8

[devout elbow]

yeah you already have that

[balmy dagger]

I do

[devout elbow]

what is not clear about that?

[balmy dagger]

I thgought we already did that

[devout elbow]

I have no idea what you did

I'm telling you that in BF Configurator, if you want to bind in D8, you must set it to FRSKY_D

[balmy dagger]

internal rf is on frsky_D d8

oh

is that it

[devout elbow]

save it

then bind

then check if the sticks move

[balmy dagger]

saved

ok it beeped like 3 times or something

no beeping

do I exit it now?

ont he radio

nothing moves on screen

[devout elbow]

did you click Bind in BF?

before clicking BND on the radio?

[balmy dagger]

oh

no

[devout elbow]

dude

I have run out of ways to write it

[balmy dagger]

ok its done

[devout elbow]

so, stick movement?

[balmy dagger]

the sticks move

aux 1 is 1500

liek u wanted

[devout elbow]

aux1?

[balmy dagger]

yeah

[devout elbow]

we were checking CH1 not AUX1

AUX1 is CH5

[balmy dagger]

[devout elbow]

well idc

you have an easy way to switch between those

[balmy dagger]

same

I hate this crap

[devout elbow]

same what

dude

I am not a cryptographer

I can't decypher

what is wrong

[balmy dagger]

its not ur fault this isnt working

[devout elbow]

WHAT IS NOT WORKING

JESUS

[balmy dagger]

I thought it wasnt working

is it working

IDk

[devout elbow]

what do you think is not working

[balmy dagger]

I thought u thought it wasnt working

id whats going on

[devout elbow]

never said anything like that

[balmy dagger]

idk

[devout elbow]

anyway

we switched to D8 because you were having trouble adjusting SFHSS to work correctly

D8 is a worse protocol though, but no matter, at least it will fly

does it still do that crap where the values jump around? @balmy dagger

[balmy dagger]

nope

the drone on the screen isnt spinning

[devout elbow]

okay, so at least that's an improvement

does it spin when you move the sticks?

[balmy dagger]

and it seems to respond

it only spins when I move the right stick now

[devout elbow]

ok

[balmy dagger]

and it moved whatever way I turn it

[devout elbow]

the reason why it was spinning constantly with SFHSS was because the channels were not centered on 1500 but 1520

which is what you were supposed to fix with the subtrims

but I think you confused CH for AUX

well

¯_(ツ)_/¯

at least it doesn't do that weird on/off crap anymore

[balmy dagger]

welllll

so

is it good

now

[devout elbow]

check the switch movement

[balmy dagger]

this is what I see

it seems to move nice

[devout elbow]

figure out which switch moves AUX1

as that's usually set as the arming switch by default

[balmy dagger]

its E

[devout elbow]

go to Modes tab

tick "Hide Unused Modes"

and send a screenshot

[devout elbow]

to explain what this means

basically

"When AUX 1 is between 1700 and 2100, turn the ARM mode on, otherwise turn it off"

does that make sense?

[balmy dagger]

whats ARM mode

[devout elbow]

in regards to how it's adjusted and stuff?

do you see the ARM on the left?

that's the name of the mode

ARM is the mode that turns the drone on

Armed/Disarmed - do you know these words?

[balmy dagger]

I see ARM

doesnt armed mean u can fly it

and disarmed when u wont be able to fly it even when moving the stivcks

[devout elbow]

yes

that's precisely what this mode is

when you turn on the ARM mode, you turn on the drone

[balmy dagger]

I see

when I have E all the way up it says disabled

[devout elbow]

yeah that's because it's in the configurator

when the configurator is connected, arming is disabled

for safety reasons

[balmy dagger]

ah ok

so it should be able to fly now?

[devout elbow]

you can see how the modes turn yellow when they're turned on

just make sure to check out what switches activate what modes

so that you know what control scheme is turned on

[balmy dagger]

gotcha

[devout elbow]

here it's in Horizon mode

I hate horizon. It's stupid.

lol

the default flight mode of betaflight is Acro

when none of these: [angle, horizon, acro trainer] are active, the drone is in acro.

[balmy dagger]

idk what that means

[devout elbow]

wdym

[balmy dagger]

[devout elbow]

you definitely learned that when doing the absolute bare minimum of research before buying any of this shit

and of course during the several hours you spent flying in simulators

-_-

[balmy dagger]

im about to fly it

@devout elbow ITS MOVING AIR THE WRONG WAY

ITS TRYNA FLY INTO THE GROUND

[devout elbow]

did you put the props on backwards? 😂

or

[balmy dagger]

o

[devout elbow]

did you put it upside down?

[balmy dagger]

defo the props

[devout elbow]

send a photo

[balmy dagger]

do I swap them all?

[devout elbow]

of how you put the props on

there are two levels of wrong that you can do

[devout elbow]

this is the bottom of the drone?

[balmy dagger]

no

top

[devout elbow]

why is the camera pointed towards the ground?

[balmy dagger]

didnt u want to see the props?

[ashen marten]

https://tenor.com/view/head-to-desk-boom-gif-25667908

[balmy dagger]

[devout elbow]

thank you @ashen marten I wanted to find that one

@balmy dagger the props have an UP direction

you can put them on upside down

and then it won't fly

[balmy dagger]

so just flip them

all of them

[devout elbow]

omfg

I DON'T KNOW

[balmy dagger]

BRUV

[devout elbow]

I can't know because you're not giving me any good info

[muted lagoon]

bro make them all blow air down

[devout elbow]

without knowing if this is the top or the bottom

[balmy dagger]

idk it just blows air up

[devout elbow]

you can do that with props that are upside down
and then it won't fly either

this it, right?

[balmy dagger]

ye

[devout elbow]

okay, so now we know which is the UP direction - battery is on top

in that case, the props are NOT flipped upside down, they're correct in that regard

so you just need to swap them around

[balmy dagger]

hmm

so I just move them to another motor

[devout elbow]

swap them either front to back

or left to right

but NOT diagonally

the props should be the same diagonally

?

[balmy dagger]

that is the right way up

[devout elbow]

@icy osprey

at this point idk either 😂

[balmy dagger]

why is the response rate so damn bad

[devout elbow]

what response rate

[balmy dagger]

WHY IS IT TRYNA BOUNCE

[devout elbow]

because it's a drone

it's not a car

it doesn't like being on the ground

[balmy dagger]

LES GOO

IT WORKS

[ashen marten]

Now imagine how much sooner it would've worked with some basic research

[balmy dagger]

it goes to the left tho

[ashen marten]

hard roll, or just a slow constant movement?

[balmy dagger]

slow

[devout elbow]

what mode are you flying in?

[ashen marten]

did you expect it to stay in a perfect hover like a DJI quad?

[balmy dagger]

ye

[ashen marten]

then throw that expectation out of the window

[devout elbow]

https://tenor.com/view/head-to-desk-boom-gif-25667908

[balmy dagger]

so its normal for it to go to a random direction

[devout elbow]

no, if it's got a competent pilot

[balmy dagger]

I didnt even touch the sticks

[devout elbow]

do you have a driver's license?
just asking so I have a comparison

[icy osprey]

It just needs calibrating

But it won't ever completely hold station

[balmy dagger]

thats what I was thinking these goofs think they got jokes now

[devout elbow]

fuck you I'm not helping you then

[balmy dagger]

NOOOo

[devout elbow]

you can't answer a simple fricking question

[balmy dagger]

PLEASE

[devout elbow]

what is so difficult about answering this question

ffs

without knowing that we can't tell you what to do

[balmy dagger]

fuck it im happy that it at least lifts off the ground

[devout elbow]

I told you what the modes are
I told you how they're configured

and if you need some adjustment
then I need to fucking know which mode you're flying in

[ashen marten]

don't bite the hand that feeds you, @devout elbow already endured way more than he should've with you

[balmy dagger]

Thank you very much for the help

[devout elbow]

dude

[balmy dagger]

@devout elbow u r a real one tho

[devout elbow]

can you please

just

answer

the question

[balmy dagger]

idk

what mode im in

yeah idk

[devout elbow]

so

all of that I wrote about how to do stuff in the Modes tab

you just completely ignored?

I just don't get it

[balmy dagger]

there was a lot

[devout elbow]

I'm not writing it just for the heck of it

[balmy dagger]

r u talking about the modesel option

[devout elbow]

no

[ashen marten]

this is literally all he wrote in regards to flight mode settings

[devout elbow]

HERE

[balmy dagger]

this is probably why idk

[ashen marten]

https://vitroidfpv-sv.netlify.app/faq#flightModes

[devout elbow]

I've truly run out of ways to explain it

[balmy dagger]

U dont need it

it is flying

thats all I care about

[devout elbow]

I need to otherwise you will crash it without knowing why you crashed it

If you have it in Horizon mode, then you will try to go past a certain stick precentage, make a flip, and then crash horribly

if you have it in Angle mode, you will come back asking how to do a flip

if you have it in Acro mode, without spending any time in simulators, you will crash a lot before learning how to fly it properly

[balmy dagger]

Its in horizon mode from what I remember

[devout elbow]

If you're not willing to gather at least a basic level of understanding of what is going on, I won't be able to help you advance

it was in Horizon mode at that point in time

but that's controlled by the switches on the radio

and idk what you did with those

the flight mode is a conscious choice that you have to make

[balmy dagger]

so I can switch it on the radio?

[devout elbow]

how is this even a question

that was the whole part about explaining the Modes tab

[balmy dagger]

U never said it could be done on the radio

we did it in the software

[devout elbow]

what

[balmy dagger]

u know wat

nvm

we good

[devout elbow]

.

did you not even read this? @balmy dagger

what does AUX 1 mean to you?

I was pretty sure that we had gone through that

now I'm questioning it

[balmy dagger]

ngl I just see numbers

[devout elbow]

well they are just numbers

remember how in Receiver tab your stick movements and switch clicks changed stuff? @balmy dagger

[balmy dagger]

yes

[devout elbow]

The radio sends (in your case) a total of 8 channels of data

first 4 channels are used by the sticks

Roll, Pitch, Throttle, Yaw

the remaining 4 channels are controlled by switches

on the radio, the 4 stick channels are CH1-4
and the switch channels are CH5-8

in Betaflight, the stick channels aren't numbered, and the switch channels are AUX1-4

so, radio's CH5 is the same as Betaflight's AUX1

does that make any kind of sense to you?

[balmy dagger]

Yes it does

[devout elbow]

okay

in Betaflight's Modes tab

[balmy dagger]

so those r just ways the software uses to display the sticks

[devout elbow]

In Betaflight's Modes tab
you assign AUX channel values to trigger certain Modes

Modes change how Betaflight behaves

or turn some things on/off

Here is how you have the ARM mode configured:

if I were to translate ^ into words
it would be
"When AUX1 value is between 1700 and 2100, turn the ARM mode on, otherwise turn it off"

does it make sense now?

[devout elbow]

not sure how you mean that

[balmy dagger]

I think this is what I meant

[balmy dagger]

so this tells the drone when to arm or when to be disbaled?

the value

[devout elbow]

yes

[balmy dagger]

W

[devout elbow]

with the way that it is configured

it tells it to be armed when AUX1 value is between 1700 and 2100

2 position switches switch between ~1000 and ~2000
3 position switches switch between 1000, 1500 and 2000

do you now know how to figure out what mode it's in? @balmy dagger

you can just look at which mode is yellow, or check in your goggle OSD.. if that element is enabled

@balmy dagger If you are flying in Angle or Horizon, then you will want to use the Calibrate Accelerometer button in Betaflight's Setup tab
you need to have it completely level when doing that, as that's its reference that it's calibrating to

this is however completely moot in Acro mode

also make sure that your sticks are centering properly (that they're at 1500 when you let go)

if they have some randomness, like +-2 (1498 to 1502), configure the RC deadband to that value (+-2 = set deadband to 2)