You can upload a pdf document and markup the document besides live broadcaster. And the whiteboard function is also available.
Lightweight IM supports one-to-one chat, group chat, and chat room which can send message during android platform, ios platform and web platform.
The communication between two devices can connect directlty without server：
The Raspberry Pi car transmits the video back to the controller's mobile phone in real time:
The hdmi signal of mac computer which is captured by the Haisi arm board is broadcast for screen recording：
Hdmi connects the camera:
If you don't want to compile the program, you also can download the apk to experience the functions：
Click to download the android demo. Pay attention that you should install demo on two phones for voip test. You also can scan the QR code below to install the apk.
Besides sending message between the apps, the demo app can also send messages to this page for testing when doing IM test：
You can also test other functions such as 1to1 video on this page:
Test car, face recognition, online education, etc.：https://docs.starrtc.com/en/download/
Phone Number: 186-1294-6552
QQ group ID:807242783