CTR2-Mini+ provides the hardware to convert the Seeed Studio Wio Terminal into a complete, easy to use radio controller system.


CTR2-Mini+ is available as a PCB kit or as a fully assembled and tested unit. Information on these options can be found on this blog post. The CTR2-Mini Antenna Switch Controller is also available. It comes in two versions, a 1X8 and 2X4 (expandable to 2X8) controller and is also available as a PCB kit or fully assembled and tested.

NOTE: If you’re interested in the PCB kit, enclosures, or an assembled original CTR2-Mini (as seen in the September 2022 issue of QST) contact me for availability and discount pricing.

You can click the link below to download an Excel based order from. The Excel form will calculate the total cost of your order before shipping. There’s a link at the bottom of the form that creates an email to send it back to me.

Or, you can use the online form at the bottom of this page to submit your order. Regardless of the method you choose I’ll send you an order confirmation with the total cost of your order including shipping.

If the options on the order form don’t match your needs, or you’re not sure what you need to order, just describe what you’re looking for in the ADDITIONAL INFORMATION field on the form below and submit the order form. I’ll get back with you to discuss your needs. You can also contact me directly if you have any questions.

On the online form, make sure your email address is correct and enter your shipping address in the Additional Information field if it different than what’s listed in QRZ.com.

Enter the quantity of each item you want to order in the fields below.

I will respond to your order email with a quote for the total cost including shipping. Shipping costs vary depending on what you order and your location. I will fill orders on a first come, first served basis. Parts availability has, and may continue to cause unexpected delays. I keep a limited number of PCBs in stock so these generally ship immediately.

Complete units are custom built as they are ordered so it may take a few days for yours to ship depending on the number of units ahead of yours and parts availability. I will keep you posted on your unit’s progress.

No payment is required until I have your items ready to ship. At that time I’ll email you an invoice for payment. Once payment has been received (and cleared if paying by personal check) I’ll mail your order via USPS and email you the tracking number.

I accept PayPal or personal checks drawn on a US bank for the exact purchase price. Please specify which your prefer on the order form. PayPal fees will be added to the quote if you specified this payment method. PayPal fees are 3%.

NOTE: To make sure my emails don’t get sent to your spam/junk folder, add my email address to your email white list.

Use the [Tab] key to move to the next item on the order. Pressing [Enter] will submit the order.

Once you click Submit the form will clear and a message will appear showing the status of your order submittal.

You may cancel your order at any time prior to the ship date. Just send me an email to cancel.

Please note the following:

The CTR2-Mini+ does not come with an external Radio I/O module. You can control one radio using the internal radio I/O circuit in this unit. If you want to control multiple radios using a manual RJ45 switch as shown in this post, order one Radio I/O module for each radio and remove the jumpers on the internal radio I/O circuit in the Mini+.