 Hi everyone, and welcome to this Virtual ST Developer Conference 2020. My name is Raffaele Riva, I'm an application engineer on Ultra Low Power Connectivity, and with this short video I'd like to introduce you to our latest Blue Energy Dash LP device and show you how to use it in order to set up a 2.4 GHz proprietary radio link with extremely low latency and high throughput for developing your own application. If you are interested in more details, please keep watching. Now I would like to introduce you how to make use of the proprietary 2.4 GHz radio for building high throughput and low latency radio frequency communication application using our Blue Energy Dash LP device. Blue Energy Dash LP is our latest introduction among the Blue Energy product family and it's a Bluetooth Low Energy 5.2 certified system chip. But Blue Energy LP is not only Bluetooth Low Energy. So by getting rid of the certified BLE radio stack we can through a dedicated hardware instruction layer communicate directly with the 2.4 GHz radio implementing a proprietary RF protocol. There are two main advantages for using a 2.4 GHz proprietary radio. The first one is lowering the latency. Bluetooth Low Energy stack and Bluetooth Low Energy specification will impose at least a 7.5 ms latency between two consecutive notification packets and this is what is named connection interval and the minimum value again is 7.5 ms. Through dedicated radio timers and receiving window when we do not use the Bluetooth Low Energy radio stack we can make use of the proprietary 2.4 GHz radio without this limitation of the connection interval. So as soon as a packet is received we can send back an acknowledgement and then a new data packet can be immediately transmitted from one end to the link to the other one without waiting the 7.5 ms connection interval window. The second advantage is increasing the throughput. So by removing the connection interval the application throughput is also increased and also the 2.4 GHz proprietary radio can also offer the same benefit of the 2 mbps physical layer modulation as in the Bluetooth 5.0. Here in this table I've summarized and compare the same scenario using Bluetooth Low Energy radio stack and a 2.4 GHz proprietary radio driver. Both scenarios as a packet length and link layer of 20 bytes the connection interval for the Bluetooth Low Energy is 7.5 ms. The idea of connection interval is no longer there with the 2.4 GHz proprietary radio. Both the application make use of 1 mbps physical layer modulation the application packets are got notification when using BLE and transmitting in unidirectional mode with the 2.4 GHz proprietary radio and you see at the bottom the application throughput is more than double using the 2.4 GHz proprietary radio driver. This driver is very flexible so we have a programmable packet payload ranging from 0 to 255 bytes you can program the symbol rate from the default setting of 1 mbps you can scale up to 2 mbps for increasing the throughput or if you want on the other end to increase the communication range you can scale down to 500 kbps or 125 kbps We have two options of reliable and unreliable transmission the difference is the requirements of acknowledgement packets by the other end of the link or not reliable guarantee data retransmission whenever this is needed the unreliable option is for best effort traffic and lowest latency application how to evaluate the 2.4 GHz proprietary radio driver through our evaluation kit that goes with the name, the commercial name STEVAL-IDB-011V1 for all the additional information that you might need I would point you to the website STEVAL-IDB-011V1.0 STEVAL-IDB-011V1.0 How to evaluate the throughput we can set it up very quickly quick demo using two blue energy LP evaluation board for bi-directional traffic one will be the transmitter and the other one will be the receiver so once you download and install the blue energy LP SDK you can browse from the windows start menu the blue energy DK version 1.0 and you will see there the blue energy dash LP navigator the blue energy dash LP navigator is an out-of-the-box PC interface that allows you to quickly test and check our blue energy dash LP device so here you will select the button demonstration applications then you scroll down to the 2.4 GHz proprietary radio examples here you have a list of examples we focus now on the throughput TX and throughput are X options so one is for one board and the second one is for the other board you have two configurations bi-directional or unidirectional data transfer if we focus on the bi-directional that is the current demo here at this point you will see a button flash and run so you will hit this button you will program the board and you will see how the demo will look like so here we are with our two evaluation kit one here in my hand it's what we will refer to as the receiver the other one here on the desk would be the transmitter even though the communication flow is bi-directional so they will switch role every other packet sent so as soon as I will release out of the reset my receiver board you will see the big blue LED blinking to notify that it is getting data transmitting data on the other hand connected to the serial terminal you will see the transmitter outputting in real time the throughput here what I would recommend is to power up the receiver board using two triple A's battery on the bottom of the board and the reason why is that without any USB cable on one hand what you can do is do some real world testing moving around inside your office space outside in line of sight moving around with one end of the link and checking how the throughput will be affected by increasing or decreasing the distance thank you for watching and enjoy the test with this 2.4 GHz proprietary radio protocol using our Blue Energy Dasher B device bye