LPS Mini

11 LPS^2 Mini are assembled and do not produce smoke when powered up. In a few days Blueberry PCB:s will arrive to the lab. We are prepared with 3D printed test jigs!

A stripped down version of LPS^2 Mini (no UWB) will be sent to the factory on Monday. Main features:

* Cortex M4F (nRF52832).

* BLE, ANT or your favourite home made ISM protocol for 2.4 GHz.

* Accelerometer, gyro and magnetometer: MPU-9250.

* Altimeter/barometer: LPS22HB.

* UV and ambient light: Si1133.

* RH and temp: HTS221.

* Two GPIO.

* Battery holder for CR1632.

* Size: 20x20x6 mm including battery.

More info: http://www.loligo.se/Blueberry/

Blueberry can for example be used as a tiny weather station or IMU.

The first LPS^2 Mini prototype passed first HW tests! No smoke when applying power and the MCU can talk to its sensors! Now we will assemble more of them in our lab and write a Board Support Package (BSP). Stay tuned for updates! :-)

Prototypes of LPS^2 are currently being assembled in a factory. Looking forward to test also them!

We are proud to announce LPS^2 Mini, our second member of the new LPS^2 family!

http://www.loligo.se/LPS2_mini/LPS2_mini.pdf

http://www.loligo.se/LPS2_mini/LPS2_mini.wmv

These are the main differences compared to LPS^2:

* DWM1000 instead of DW1000.

* Slighly different I/O usage.

* No circuitry for TDoA/AoA, but will work with TDoA/AoA enabled anchors such as LPS^2.

* No external FLASH.

* No WiFi.

* Size: 25x30 mm.

LPS^2 Mini is intended to be a tag, but can also be used as a TWR anchor. Production will hopefully begin tomorrow.

We have spent several months working with Angle of Arrival (AoA). As a result we found reasons to redesign our latest generation of LPS boards a bit. This new board combines all our knowledge so far:

http://www.loligo.se/LPS2/LPS2.pdf

http://www.loligo.se/LPS2/LPS2.wmv

In short this is what LPS^2 can offer:

* ARM Cortex M4F.

* UWB.

* WiFi if needed (can be soldered in as a ESP12-E/F module).

* Can act as a RFID tag.

* Accelerometer/gyro/compass/altimeter/thermometer.

* TCXO or ordinary XTAL.

* Clock and sync handling/distribution for TDoA/AoA.

* Can charge a LiPo either from USB or a small solar panel.

* Can be controlled and reprogrammed via USB, BLE and WiFi.

* Extra flash for data storage.

* Size: 34x52 mm.

It will very soon be sent to production! :-)

As pointed out earlier this board will not replace any of our other boards, it is rather a complement with the ability to work as a TDoA/AoA anchor.

Here is a sneak preview of an upcoming prototype:

http://www.loligo.se/LPS_sneak_preview.wmv

Hopefully most of these features will work already in the first prototype (you never know, the entire board might turn out being an expensive glowing hot power resistor):

* UWB using DW1000 instead of the DWM1000 module.

* BLE for communication, firmware upgrades and the ability to act as a BLE beacon.

* USB for power and serial communication.

* RFID tag (requires external antenna).

* Solar charger for a single cell LiPo battery.

* TCXO to get rid of the thermal drift present in DWM1000.

* Optional sensors for inertial navigation.

* Optional external flash for data logging.

* Optional circuits to handle clock sync and clock distribution (useful for TDOA and especially AoA).

* GPIO.

Anything missing?

This board will not replace any of our other boards, it is rather a complement. LPS Mini will still be smallest.

The LPS Mini WiFi Adaptor turned into LPS WiFi! It is intended for anchors, but can also be used as a tag. This is our first untested prototype:

By soldering in all components on the bottom side of the PCB, it will hopefully be able to stream audio in two directions via WiFi. Sound files can also be stored on a Micro SD card. An OLED display can be soldered in if needed.Currently we only have a few hand built prototypes. We will come back when production is up and running.

LPS Mini + OLED + LiPo in a little 3D printed case = our implementation of Decawave's EVK1000.

http://www.loligo.se/LPS_mini/twr.mp4

Took longer than expected to receive ESP-12E, but now we are good to go!

LPS Mini does not need a test jig, it is just to plug it into a TE Connectivity 5650712-1. its bigger sibling LPS is a bit more complicated to test. Luckily a test jig is easily made using a 3D printer and pogo pins! Keep in mind that high temperature filament is required to avoid misalignment/deformation while soldering in cables to the pogo pins.