Setting up your Tasmota on Sonoff Pow R2 or R1 to measure your Solar and wind power generation

Setting up your Tasmota on Sonoff Pow R2 or R1 to measure your Solar and wind power generation

Sonoff POW R1 and R2 Tasmota 4M memory. 

 

(Reading Power and sending the info to MQTT and Node-red) 

Pres button on Sonoff POW R2 when Connecting to device in programmer to put device in programming mode.

/home/dir/anaconda3/lib/python3.7/site-packages/tasmotizer_esptool.py 

Write_flash -fs 4MB -fm dout 0x0 tasmota.bin

Reading the existing Sonoff POW R2 file for backup using the esptool https://github.com/espressif/esptool/releases/tag/v3.0
esptool.py read_flash 0x00000 0x100000 fwbackup.bin 

Tasmotize the Sonoff POW R2 /home/anton/anaconda3/bin/tasmotizer.py
Download the bin file from Tasmota for Sonoff
Create config template for Sonoff POW R2

{"NAME":"Sonoff Pow R2","GPIO":[17,145,0,146,0,0,0,0,21,56,0,0,0],"FLAG":0,"BASE":43}

Set TelePeriod 10 for MQtt message every 10S in console

Console output

Download the Tasmota binaries from here http://ota.tasmota.com/tasmota/release/
or here https://github.com/arendst/Tasmota/releases/

Node-red grap of data

Some of the Configurations screens on The Tasmota Sonoff Device

Main Config Page

  

 

 

 

 

 

 

 

 

 

 

Sub config Page

IO pin configuration of ESP8266

 

 

 

 

 

 

 

 

 

 

 

 

Timer config screen

 

 

 

 

 

 

 

 

 

 

 

 

Example of Node-Red Dashboard

 

 

 

 

 

 

 

 

 

 

 

 

Example of Node-Red Dashboard

 

 

 

 

 

 

 

 

 

 

 

 

Example of Node-Red Dashboard

Grafana Graf of the measurements saved in influx db

How do you build a 1U Cube-Sat Linear transponder using SDR / DSP technology with limited Power?

How do you build a 1U Cube-Sat Linear transponder using SDR / DSP technology with limited Power?

Requirements:

Satellite requirements.

1. Linear Transponder 70cm (437Mhz) up-link and S band (2.4GHz or 1.2Ghz down) Down-link (Bandwidth ? 250Khz on 70cm ?)
2. Satellite Low Earth orbit (LEO) altitude between 650 kilometers. We need this so we can calculate path loss and RF power and antenna gain requirements.
3. Available Power 1.5W for transponder from Solar panels and battery system.
4. Telemetry mode? CW / AX25 / AFSK 9k6 /....  
1. UHF Beacon recomendation.
   • UHF Beacon interval:  about 55 seconds
   • UHF Transmit power: ~ 1 W
   • AFSK AX25 1k2 and fallback of CW 10WP 
5. Satellite antennas for 70cm ? and (Polarization ?) 
6. Satellite antennas for 2.4Ghz / 1.2Ghz and (Polarization ?) 
7. Telemetry Requirements ? (ID, Temperature, Power in, Power out, Battery left, Transponder Mode status, Antenna Status, Satellite Orientation, ........)
8. Inter board Connector Specification (PC/104 communication)
9. OBC, SOLAR,charger,Orientation and Battery from existing Satellite ?
10. 1 U Cube-Sat Space frame from existing Satellite (10x10x10) 1kg
11. DSP 10 to 14Bit A/D /D/A Dynamic range. what is good enough ?
12. PCB Board size details PC104 with cutouts for wire.
13. Space frame and Solar panel frame and Antenna deployment. (out of scope)
14. Solar panels. (Out of Scope)
15. Power regulator and Charge regulator and Battery. (out of Scope)
16. Orientation controls. (out of scope) (Stabilization)
17. RF Linear Transponder using SDR / DSP. (70cm up 2.4Ghz or 1.2Ghz down)
18. OBC (In scope ARM M4 or possibly A9) (FreeRTOS)
19. Inter board communication standard.

Out of Scope for now:

1. Space frame, Solar panels and panels frame.
2. Solar panels
3. Power regulator and Charge regulator and Battery.
4. Orientation controls.

In scope for now:

1. Linear Transponder using SDR / DSP. (ARM Processor possibly not FPLG due to power constraint.)
2. Telemetry TX
3. Command control RX

Block diagram.

Transponder SDR transmitter. (Down-link 145.9?? MHz USB) (not confirmed) (250Khz)

Telemetry transmitter

• Estimated TX full power for beacon and transponder (300 mW) when Sat is in sunlight.
• When satellite is in eclipse low power of about (30mW). 

Transponder SDR receiver. (Up-link 435.??? MHz LSB ) (not confirmed) (250Khz)

• Estimated maximum TX up-link power of 5 watts with a 7 dBi gain antenna. 

Beacon / Telemetry

Here are several DDS signal generators I'm looking at:

1. AD9833  0 - 12.5 Mhz 
2. AD9850  0 - 50 Mhz
3. AD9851  0 - 70 Mhz 
4. Si5351    0 - 150 Mhz
5. Si5351A 0 - 290 Mhz
6. AD9959  0 - 500Mhz
7. AD9952  0 - 500Mhz Practical max 160Mhz depending on patern

Ref : Examples code for the STM32f4  and AD9850  https://zissisprojects.wordpress.com/2015/01/24/stm32-f4-discovery-and-ad9850-dds/

1.2Ghz band plan for Downlink

TX

1. https://github.com/F5OEO/rpitx
2. http://ebrombaugh.studionebula.com/radio/txdac/index.html
3. https://www.etherkit.com/rf-modules/si5351a-breakout-board.html
4. http://www.simplecircuits.com/files/Download/QEX_release.pdf
5. http://www.amrad.org/projects/sdr/
6. https://myriadrf.org/projects/rdk/
7. http://www.eevblog.com/forum/projects/the-sdr32-a-stm32-based-software-defined-radio/
8. http://www.stm32-sdr.com/styled/index.html  (PSK)
9. https://wiki.analog.com/resources/eval/user-guides/ad-fmcomms2-ebz/software/baremetal?rev=1395324588#code_size_information ( AD9361 NON OS Drive)
10. https://github.com/GomSpace/libcsp (Cubesat Space Protoco)
11. https://github.com/robots/APRS  (STM32 APRS code)
12. https://michaldemin.wordpress.com/2012/02/27/cheap-afsk-tnc/  (AFSK stm3  2)
13. https://github.com/athirasubhash/AX25MODEM (AX25 for STM32)
14. www.analog.com/en/education/education-library/videos/3845680080001.html (Video Analog devices)
15. https://datasheets.maximintegrated.com/en/ds/MAX2837.pdf  (IQ front end Maxim)
16. https://www.maximintegrated.com/en/products/analog/data-converters/analog-front-end-ics/MAX5863.html (A/D and D/A MAXIM)
17. https://github.com/mossmann/hackrf/blob/master/firmware/common/max2837.c (max2837 c Library)
18. http://www.g4jnt.com/DDSVHFBeaconDriver.pdf  (DDS beacon generation)

Possible def tools.

1. GNU radio
2. Math lab
3. ARM DEV board tools. (How to setup Eclipse for Arm development)
4. Real time OS https://istarc.wordpress.com/2014/08/04/stm32f4-behold-the-project-wizard/
5. Installing FreeRTOS on STM32F4 https://istarc.wordpress.com/2014/07/10/stm32f4-deploy-freertos-in-under-10-seconds/

Ref :

1. http://sigalrm.blogspot.co.za/2012/09/stm32f4-discovery-quick-start-guide.html
2. https://groups.google.com/forum/#!searchin/mbed-devel/stm32f4$20discovery%7Csort:relevance

Why not put your own Satellite in space ?

 for as little as $19.00

1. Transmitter power is 10mW DSSS transmitted through a dipole. The maximum solar panel power available on the standard device is 100mW. 
2. Hardware Development Scouts can potentially have as much as 500mW solar power.
3. The orientation of the device in orbit around the earth should be able to be determined most accurately by use of the magnetometer.
4.  It might also be possible to work out orientation by using the single pixel sensor as a moon/earth/sun sensor.
5. They will be doing there best to make the landing site the earth side of the moon.
6. If you are, or would like to be, a radio amateur, they will show you how to communicate directly with your spacecraft in space when it is nearby using inexpensive UHF and S-band equipment. Communication at (cis-)lunar distances is more expensive (typically requiring 5-24m+ steerable dishes), but available to some clubs and enthusiasts.

More info is available at http://www.kickstarter.com/projects/1677943140/send-your-own-pocket-spacecraft-on-a-mission-to-th