Should I buy a Raspberry Pi 3B+ or 4B?

RemoteTx will perform equally well on either a 3B+ or 4B. Currently, the additional memory and features of the RPi 4B do not make a noticeable difference for RemoteTx operation. In the future it is possible that new RemoteTx features could be added that would take advantage of additional memory and performance that a 4B can offer. The RPi 4B is rather new and it has been noticed that it generates more heat than the 3B series. While under normal conditions it should not overheat, time will tell if there are any heat related issues with prolonged operation in warm operating environments.

What Browser should I use?

On Windows, Mac and Linux the best choice is Google Chrome. Firefox, Safari and Edge will also work on their supported platforms. On Apple iPhone and iPad IOS devices use Safari (iOS 11+). On Android phones and tablets use Google Chrome. Chrome OS uses Chrome.

Will RemoteTx work on Wifi?

Yes. By default, Wifi is not activated on a newly downloaded RemoteTx Raspberry Pi SD Card.  Initially the Raspberry Pi needs to be connected to an ethernet network when it is booted to make the Wifi configuration interface available. After Wifi is successfully turned on and configured the ethernet network can be disconnected and RemoteTx will continue to function on Wifi.
See:  Operating Notes-Wifi

What if I don’t have an ethernet internet connection to configure Wifi with?

Wifi configuration can be configured by copying a wifi configuration file directly to the /boot folder of the RemoteTx SD Card using a PC or Mac. This should be done when wifi needs to be configured but there is no ethernet internet connection available for initial configuration. Please see: Advanced Wifi

Can RemoteTx be used with Digital Modes?

Yes, with some additional components (Additional USB Soundcard and Radio VOX, or Signalink, RigBlaster etc) and computer setup (virtual audio cable). RemoteTx has successfully been configured to operate PSK31, FT8 and Winmore Winlink with RMS Express. Basically, if the digital mode software can be configured so that all interaction is through the sound card, RemoteTx should work on a low latency network. The TX/RX keying needs to be done using the radio VOX or with a device at the radio such as a Signalink that has VOX built in. This is similar to what is done if the computer is connected to a Signalink at the radio station. Additionally, a virtual audio cable (https://www.vb-audio.com/Cable/) software driver will need to be installed on the computer to assist in routing sound in the correct direction to and from the browser on the remote computer. For detailed info on setting up WSJT-X and FT8 on the Icom 7300 on a PC, please see:
Remote FT8 on Icom 7300 – PC

Remote FT8 on Icom 7300 – MAC

Will a single RemoteTx subscription work with multiple stations?

No BUT… A single subscription enables 1 Raspberry Pi connected station to be controlled at a time. Using the same license key simultaneously on multiple stations/RPi’s will cause unpredictable network and control behavior. BUT… if only one RPi is powered on at a time, 2 RemoteTx RPi’s could have the same key at 2 different locations and the station with the powered-up RPi would be the one available for control.  Just make sure they are not both turned on at the same time.

Can multiple radios be connected to a single Rpi at the same station?

Yes, but only one can be used at a time. A careful operator will be able to select and control multiple radios all plugged into the same RPi. This is where the RemoteTx power control options can be very useful. Multiple radio serial port controls will show up under the USB Serial Ports list under the Setup tab. Multiple radio audio sound cards will show up under the Audio tab. Be CAREFUL not to transmit a strong signal with one radio that could damage a second radio that is turned on. Of course, antennas will have to be configured and managed like any other multiple transmitter station.

Will RemoteTx work with Carrier Grade Nat (CGN) or other situations where I cannot configure port forwarding?

Yes. RemoteTx does not require port forwarding to be configured to work. When the RemoteTx Pi is turned on, it connects to the RemoteTx cloud servers which then manage secure encrypted radio control and audio streaming. Also, dynamic DNS does not need to be configured. This is similar in design to how popular smart plugs and home automation systems work.
See:  How It Works

Does RemoteTx support IPv6?

Yes. By default when a RemoteTx web site is created IPv6 support is not fully activated. If you need full IPv6 support, please contact RemoteTx and it can be activated.