Design how a second screen system would work

[willwade]

Need a way of showing what the last text said was.. off the device, We have communication partners who are deaf so need this to support the pasco users

Ideas:

• OLED screen that is controlled over BLE or Radio
• Separate partner app where pasco transmits text to that

EDIT

The outcome of this issue is to develop an architecture to figure out how we can develop second second screen functionality. Once the architecture has been designed, corresponding issues should be created to implement the architecture.

[willwade]

Question is - how to do this. Requirements:

• Multiple screens. So 1-4 screens required.
• Distance. Should be able to go through walls. Basically deal with a house. Screen could be upstairs from person communicating.
• a 16x2 or bigger ideally screen (something like this form factor: https://www.adafruit.com/product/1365) (maybe even https://www.adafruit.com/product/2674)
• Battery powered. Two buttons on each screen. One to pair. One to repeat last sentence displayed.
• NOT RELIANT ON WIFI We are working in schools and homes where adding a Wifi device is not allowed. Maybe a wifi peer to peer connection??

Communicated with BLE from software..

So maybe something like this as an architecture:

• Master device: Feather nrf52840 with RFM69 433 https://www.adafruit.com/product/3071 (https://www.adafruit.com/product/3232). BLE in central mode. Software SDK to BLE to main device. So BLE from cordova/flutter to a central device. Master device receives data and transmits to any paired devices.
• Child devices. Adafruit Feather M0 RFM96 LoRa Radio - 433MHz https://www.adafruit.com/product/3179

https://learn.adafruit.com/adafruit-rfm69hcw-and-rfm96-rfm95-rfm98-lora-packet-padio-breakouts

[willwade]

Ideally would like audio to come to this display too. Would mean it needs to be BLE all the way instead of radio/ble mixed. (BLE Mesh? https://www.nordicsemi.com/Software-and-tools/Software/nRF5-SDK-for-Mesh - or using NimBLE from Apache Mynewt (https://github.com/apache/mynewt-nimble/tree/master/nimble).)

Maybe it should have a bright led to flash when message received.

[biii-tech]

Hi @willwade,
read this https://blog.nordicsemi.com/getconnected/tested-by-nordic-bluetooth-long-range.
nrf52840 BLE long-range mode might satisfy your need