Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


mdf



2314 posts

Uber Geek

Trusted
Subscriber

# 240772 25-Sep-2018 14:20
Send private message

Hopefully straightforward (perhaps blindingly obvious) query re soldering antennae.

 

I bought this RF tranceiver set, due to a positive review here (scroll down to Qiachip). I've tried wiring this up to a Raspberry Pi (using a t-cobbler, rainbow cable and jumper leads) and using rpi-rf. To start, I was just trying to see if it worked by poking the antennae into the relevant hole. While rpi-rf did detect some codes at random times, these didn't seem to correspond at all to when I was actually pushing buttons on a couple of different RF remotes.

 

I am hoping (since it's the easiest solution) that this problem is just do to the antennae and if I solder them in I might have some success. However, before I do so, I was wondering if there was a right way (and therefore likely many wrong ways) of soldering these in? Do I just stick the 90 degree bit in and solder with the through the hole method? Is there are reason for the odd kink in the tail of the transmit antenna? Some of the pictures I've seen on line seem to have an antenna loop soldered in at a couple of points, not just a single one.

 

My actual goal is to control a central heating system that uses RF remotes. I've had several failures so far, including this one, a $1 RF transceiver set and a Broadlink RM Pro. If anyone has a bullet proof solution with fewer jumper cables, I'm open to that too.

 

 


Create new topic
929 posts

Ultimate Geek


  # 2097150 26-Sep-2018 22:48
Send private message

I would imagine the kink is to stop you inserting too much of the lead through the hole - only the bit between the very end of the wire up to and including the first bend should be inserted.

 

The boards and aerials are probably designed to be as small as possible in one dimension so they fit in a pocket fob. i.e. the aerials don't need to stand straight up relative to the PCB.

 

The antennae shown are unbalanced and that means they only have a single connection at one end.

 

If any aerial is connected at more than one point it is probably due to it having a ground connection. You would probably get more range from that type of aerial but you would need to know a bit more about your devices first.

 

So yep, in the hole and solder away.

 

It appears from the data sheet that you need to feed a data stream into the 'data' pin on the transmitter and extract and decode this stream on your receiver.

 

If that's what you need, great. OTOH there are simpler remotes, in the garage door style where when you press a transmit button (1 to 4) , the corresponding logic pin on the reciever toggles in level. E.g.

 

https://www.aliexpress.com/item/DC12v-10A-relay-2CH-wireless-Remote-Contro-RF-Remote-Control-Switch-teleswitch-4Transmitter-1-Receiver-Learning/32507194875.html?spm=a2g0s.9042311.0.0.27424c4dcQqGwg

 

 

 

What do you want to achieve?


2129 posts

Uber Geek


  # 2097174 27-Sep-2018 06:20
Send private message

The bend is do the antenna is on the same plane as the pcb, rather than poking out like a giant component.

Rightly or wrongly, I solder the antenna so it lies across the back of the board. I just make sure it doesn't short anything out.
I might have even put a little heat shrink over it first.




Location: Dunedin

 


Create new topic



Twitter and LinkedIn »



Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Major Japanese retailer partners with smart New Zealand technology IMAGR
Posted 14-Oct-2019 10:29


Ola pioneers one-time passcode feature to fight rideshare fraud
Posted 14-Oct-2019 10:24


Spark Sport new home of NZC matches from 2020
Posted 10-Oct-2019 09:59


Meet Nola, Noel Leeming's new digital employee
Posted 4-Oct-2019 08:07


Registrations for Sprout Accelerator open for 2020 season
Posted 4-Oct-2019 08:02


Teletrac Navman welcomes AI tech leader Jens Meggers as new President
Posted 4-Oct-2019 07:41


Vodafone makes voice of 4G (VoLTE) official
Posted 4-Oct-2019 07:36


2degrees Reaches Milestone of 100,000 Broadband Customers
Posted 1-Oct-2019 09:17


Nokia 1 Plus available in New Zealand from 2nd October
Posted 30-Sep-2019 17:46


Ola integrates Apple Pay as payment method in New Zealand
Posted 25-Sep-2019 09:51


Facebook Portal to land in New Zealand
Posted 19-Sep-2019 18:35


Amazon Studios announces New Zealand as location for its upcoming series based on The Lord of the Rings
Posted 18-Sep-2019 17:24


The Warehouse chooses Elasticsearch service
Posted 18-Sep-2019 13:55


Voyager upgrades core network to 100Gbit
Posted 18-Sep-2019 13:52


Streaming service Acorn TV launches in New Zealand with selection with British shows
Posted 18-Sep-2019 08:55



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.