@NeverDie Note that all the nRF52840 based products being showcased now (including the Fanstel modules) are using the engineering silicon. There is Errata on these parts. Production devices will be available Q1-18.

@NeverDie Hello, If you are referring to that Prototype Board with the Nordic logo on it then it was being controlled by GPIO and by the Bluetooth Low Energy stack (Softdevice) You can read more about it here.. https://devzone.nordicsemi.com/blogs/831/palna-support-in-s132/.
As I mentioned before. there is no good way to control the PA in a proprietary mode, only when using BLE. Regardless, I have asked if it is ok to share the schematic that relates to that PA board and I will let you all know. And about the question about antenna switching. This was never implemented in the Softdevice. Any antenna switching would need to be done in the application.
See if this chart helps.

@scalz
I would be interested in any range testing in regard to this dongle. For ground it has whatever it is that it is plugged into. (PC, SBC, USB extention cable, etc) There will be a nRF52840 based dongle out soon. See picture above. This dongle will need to be programed over the SWD lines. No Segger on board this one..!

@nca78 The Rev C (COO) parts are available now and they are the production parts. (Symmetry and Nordic's other distributors have these in stock) There will be a respin of this to a Rev D to fix the REG0 issue. FYI, the current nRF52840 package is not a WCSP. It is a aQFN package. The nRF52840-Dongle is also available now. Go forth and design......

@NeverDie I would use 3 ADDRESS bytes, for the reason I gave before. The receiver could see noise as a valid packet and try to process it. and the fact you have no data packet and no CRC could cause you issues in a noisy 2.4Ghz environment. . Also be aware that if the radio is not already in receive or transmit mode the PLL takes about 130us to come up and settle. Crystal start and settle time will also depend on the CL value of the Crystal and not all manufactures use the same value. Conversely you can only transmit packets for 4ms before you need to bring down the transmitter and bring it back up again for the PLL to start and settle.

@NeverDie Check out the new nRF52810. It is a stripped down version of the nRF52840.. Not as much memory and the peripherals are lower in count. But it has a Cortex M4 (Not F) and some of the targets are sensors, wearable, beacons, etc. On air compatible with nRF24L series and nRF52 series. Some limitations on BT 5.0 however.

@NeverDie You may wish to check out the nRF51 Reference guide in addition to the datasheet. http://infocenter.nordicsemi.com/pdf/nRF51_RM_v3.0.1.pdf The PPI is located in section 16.

@Nca78 How about sending a email to the company and ask if there is a distributor / Rep in your area?
Dr. Yuan Fan
Fanstel Corp.
Trusted Name Since 1990
7466 E. Monte Cristo Ave., Scottsdale AZ 85260 USA
Tel. 1480-948-4928 x101;
email: yfan@fanstel.com http://www.fanstel.com

@NeverDie check out a product called "TAG-CONNECT". It is perfect for programming. It is used on the Nordic Semiconductor Beacon Reference Design.

@d00616 not familiar with the USB interface / tag connect. The ones I have used have the connector type that plugs onto the nRF5x-DK, uLinks, jlink lite, etc. a ten pin Micro Cortex connector to six or ten pin "pogo pin" tag-connect connector. There is also a clip that allows the connector to stay attached for debugging purposes.

@Nca78 I suggest downloading the "command line tools" as well.
https://www.nordicsemi.com/Software-and-tools/Development-Tools/nRF-Command-Line-Tools.

@Nca78 nRFgo Studio has been put to sleep. nRFgo studio does not have support for the newer Nordic devices. nRFconnect for Desktop has taken its place. I suggest when using the nRF52-DK (or any nRF52 based DK) that this newer utility be used.

The nRF51822 has been used successfully in many coin cell applications including beacons, wearable, etc. There were three versions of this device. Only REV 3 silicon is being shipped by Nordic. Any older parts should be avoided. If you are wondering what rev you have there is a chart in the compatibility section on the Nordic Semiconductor website. I would add that If supported by the sensors and such I would suggest looking as some of the newer parts in the nRF52 family. Some have a low membory variant that may work for you too. Using the DC/DC converter you can achieve about 6mA of receive and transmit current and sleep currents in the uA range and nA in power down.

@Jon-Raymond Correct. It is a nice product for the price and the intended user. As Jon mentioned, you can use the command line tools as well as nRFconnect and also has direct hooks into the Segger Embedded Studio which is a fully functional IDE / compiler/ Debugger and is free when used with Nordic Semi devices.
Plus there is no license conflict as there is when using one of these cheap overseas j-link knock offs. (Which could "break / brick" anytime doing a "official" Segger update on these clones.)

@Calvin-Khung
Jokgi
Jokgi about 2 hours ago

Calvin, You can buy a Nordic Development kit for about $50 dollars or less. It has the J-Link OB device on it for SWD programming and debugging.

Calvin, You cam buy a Nordic Development kit for about $50 dollars or less. It has the J-Link OB device on it for swd programming and debugging.

Hello,

I see two issues with this schematic. 1) The Cap C3 looks like it says 100nf. In the non-amplified use, this should be at least 4.7uF. If you are using a PA I would suggest a even larger value be used.

PO.25 and PO.26 if not used should be tied to ground. If used then they should each have a 12pF cap to ground. The internal bonding wires on the QFN package picks up some stray RF and will probably not pass any agency testing in Korea or Japan. This is probably not that important for personal use.

@absolem Check out the css811 sensor. It can detect CO2 such as we al know we exhale with every breath. This is the same device used on the Nordic Semiconductor “nRF52 Thingy”.

http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.rds%2Fdita%2Frds%2Fdesigns%2Fthingy%2Fhw_description%2Fhw_descr.html

@neverdie And it has the 32Khz crystal on it too which will reduce power consumption. And It looks like the DC/DC converter is also included?