CC1352P1 LaunchPad communication distance test

littleshrimp

CC1352P1 LaunchPad communication distance test [Copy link]

CC1352P is a multi-band wireless MCU with integrated PA. The maximum transmit power at SUB-1G can reach 20dBm. This is why the CC1352P LaunchPad is $10 more expensive than the CC1352R LaunchPad without integrated PA. The simplest and crudest way to judge whether the wireless board is good is to directly measure the distance. I used the si4438 module before, and the transmit power was also 20dBm, the receiving sensitivity was -124dBm, and the receiving current was 14mA. The transmit power of CC1352P is 20dBm, and the receiving sensitivity is slightly worse -122dBm. The receiving current at 868MHz is 5.8mA, which is much lower than si4438. When testing, use CCS to import the rfEasyLinkRx and rfEasyLinkTx routines in easylink under simplelink cc13x2 sdk to view the code. The transmit power is 20dBm, 868MHz, 50K 2GFSK My home is less than the 20th floor, and there is a big road downstairs, which can basically ensure that there will be no obstacles blocking the power on of the transmitter board during the test. The red light of the receiving board will keep flashing when receiving data First put the transmitter board on the terrace and connect it to a 5V power supply. The power supply is powered by the charger that comes with the MOTO mobile phone The receiving end is powered by a mobile power supply. I walked out of the community and went downstairs and found that the reception was intermittent and often no signal was received Because the code did not determine the frequency, it must be 868MHz. I went back upstairs and set the frequency to 868MHz through the function EasyLink_setFrequency(868000000); according to the comments in the code. When I went downstairs to test it, it was the same. When I crossed the road and walked under the arrow, I basically could not receive the signal You must know that the 20th floor is only 60~7m. Will communication be blocked by obstacles? I think there must be something I didn't configure correctly. TI products shouldn't be like this. I went back and read the code again but couldn't find the problem. I was ready to try again. Just then, a courier arrived. When I went to the north courier cabinet to pick up the courier, I turned on the power of the receiving board and found that I could receive the signal even after walking a long distance. I put the transmitting board on the south terrace. I went to the back of the community to pick up the courier. At least my building was blocking the way. Why could I receive the signal at this time? The problem should not be caused by the development board. After picking up the courier, I continued the previous test. When I crossed the road and there was no signal, I didn't stop, but continued to walk for about 300 meters. The received data became stable. The farthest I walked was 520 meters. I could also receive data continuously. When I was farther away, the signal was not very stable. When I walked 800 meters, there was a big tree blocking the way. I could still receive data, but it was very unstable. When I tested si4438 before, I could basically reach this distance. The difference is that si4438 was placed in the wall indoors. The distance was farther and there were more obstacles. The communication rate was 10Kbps The CC1352P1 uses a 50Kbps rate that is much higher than si4438, which will affect the communication distance. In recent years, the city has developed, and there are many more residential areas nearby. There is also a tram line downstairs in my house, and the interference will be much greater than before. The reason why you can't receive the signal downstairs is probably caused by the interference of trams or other base stations, especially trams. When driving along the lanes near high-voltage lines, the radio can hardly hear the content clearly, and there will be buzzing sounds from time to time when trams are running. If these two boards are placed in the countryside, I don't know how far the communication distance can be. I can try it when I go back to the countryside on the 11th.

Int8

Reply test

alan000345

The anti-interference performance is so poor. If it is made into a product, wouldn’t it be easy to get out of control at a long distance?

曹必强

good!

电容器

The OP did a really good job.

Jacktang

The CC1352P1 uses a 50Kbps rate which is much higher than the si4438, which will affect the communication distance. This is indeed the case.

alan000345

The host did a great job

大秦正声

have a look

sdk怎么做

Is there any SDK for 2.3 or earlier?