Bluetooth Low Energy Eval-Kits für ihr funkendes Projekt Wer ein reales BLE-Projekt mit Forecast hat, konnte sein Projekt melden und hat eine Chance auf ein Eval-Kit für Euro 0. Das Eval-Kit hat von Haus aus einen Temperatursensor und Beschleunigungssensoren. Weiterhin kann es leicht um andere Sensoren erweitert werden. Ich packe gerne noch folgendes oben drauf: […]
Selection of ceramic GSM chip antenna I. Size of GSM ceramic chip antenna The size of the ceramic GSM chip antenna is 21 x 7 x 3 mm only. The distance for the selected ceramic chip antenna to the ground plane has to be to be 7 mm. There is a need for a gap […]
About IoT Meetup group in Zurich The Internet of Things is connecting us all. We should connect in person, in the real world, as well as digitally! This meetup group is for everyone who is interested in doing projects and publishing their data using IoT tools and platforms. I will talk 25 minutes about the […]
Bluetooth Low Energy beacon with support of RSSI level plus temperature, luminance, acceleration and magnetic sensor I. Temperature sensor That means it any beacon in the evaluation kit is a wireless thermometer. It is also waterproofed. You can use it at your terrarium, aquarium of or doghouse. II. Magnetic sensor Just stick the RF beacon […]
April 2014 @ M2M Journal http://www.m2m-alliance.com/fileadmin/user_upload/pdf/m2mJournal/140402_M2M_Journal_low.pdf The example of a locating device based on cellular modules (GSM, HSPA, LTE) and GNSS modules (GPS, Glonass, All Galileo) explains how to develop a complex IoT / M2M-device with embedded antennas. The person, who has to develop a telemetry device, ignores the part of GNSS. The 20 years […]
GSM chip antenna design mistakes in detail I. Size of the ground plane The length of the distance marked with I is 56 mm only. Most GSM chip IFA antennas or PCB track antennas will radiate perfect on an estimated length of the PCB of 90 to 100 mm. Just compare it with the length […]
Be aware that a GSM module will charge up to 2 Ampere peak current during 2 Watt TX power Take care that your power supply will be able to drive the current peaks. Have a look on short PCB tracks in right width. And have a very close look on a capacitor with low impedance […]
Q: I am trying to figure out if it is possible to design a reasonable quad band on a PCB that has a total overall size (ground plane plus antenna) of about 60x30mm, using a GSM module. Have you ever tried something around this size? A: Some chapters out of my IoT M2M book: 7 […]
GSM antenna designs mistakes in details I. Size of antenna ground plane If you compare the simulation of the GSM antenna in the IoT M2M Cookbook with the antenna at the picture, then you will understand that the antenna efficiency at GSM 850/900 will be poor, because the PCB is already much to short. Nobody […]
Wer nun auch aus dem iBeacon, Wearable und IoT-Kuchen ein Stück schneiden möchte erhält die Gelegenheit: Bluetooth Low Energy Eval-Kit ca. Euro 110 Kostenfreier Quelltest zum Kit für div. Anwendungen (3 Achsen-Beschleunigung, Temperatur, Luftfeuchtigkeit, …) Kostenfreier Quelltext für die App auf iOS und Android Kostenfreie Gerberfiles und Schaltbild des Kits im Download Preiswertes Anpassnetzwerk (7 […]