I don't know specifically if your Negative Ground one will report current or power, but let me know. Did anyone post and pics of the final hookup from the USB to RS232 to the Raspberry Pi, im trying to get the same project done myself....any help would be highly appreciated. You can download it here: https://github.com/wildmountainfarms/solarthing/raw/master/other/solar/resources/renogy_rover_modbus.docx or https://github.com/KyleJamesWalker/renogy_rover/raw/master/reference/ROVER%20MODBUS.docx. Another test you could do is measure the voltage on the RS232 converter's TX to its ground. I also want to roll in the functionality I currently have in an Arduino for supporting load measuring. I don't have pictures, but you can use a multimeter to make sure the voltages are correct. It uses an INA219 over I2C rather than reading the mV directly as you have. … It's not actually hooked up to any solar panels yet, so most of the data is just zeros. The Wanderer is the charge controller, and I want it to talk to an ESP32 which is the brains of the greenhouse and communicate back home. Not sure how many people are using the RS232/USB cable, but it seems that this device is no longer supported by Renogy, maybe a public release of the command set is in order. I'm out here listening and you've provided a big head start. If you're using this for future reference, make sure to test it with a multimeter because it could be flipped.When I measure the voltage from TX to Ground, it's 5.66 Volts. After pairing is done you can monitor your system and change parameters directly from you cell phone or tablet. The newer ones on Amazon don't come with that cable anymore :/. In Modbus RTU and Modbus ASCII RS485 is used as the physical layer… 50A DC-DC On-Board Battery Charger with MPPT 4.2 out of 5 stars 4. Thank you for the informative post. Once you know which one TX is, you can use the TX/RX/GND/GND/+/+ layout to know that RX is next to TX, which is next to GND. (I haven't found a use for the unimplemented data anyway)There wouldn't be any problems that come up using Python at all. Well, I didn’t find any well documented article on google for connecting Arduino and raspberry pi over bluetooth HC-05. What is the correct Modbus address of the charge controller?? And allows users to change parameters when using the Renogy BT App. The Renogy BT-1 is a great addition to any compatible Renogy solar charge controllers. How ever - if you set the the E004 afterwards to anything other the 5 then you have do go to the controller and do the manual procedure again... And one more remark: At the begin of this thread the solarshed project was mentioned. Appears these are not supported for Wanderer PG (pos ground)  :(. What are you using to convert the RS232 signal? It's written in C++. Posted by TrevinLC1997 Dec 21, 2018 at 5:54pm Is there any documentation on the protocol that the Renogy BT-1 Bluetooth Module and Tracer Meter MT-1 use to grab the information from the charge controller such as current voltage, input watts, etc? Key Features It is compatible with select Renogy charge controllers through the RS232 port. I had no 6pin plugs so I ground down each side of an 8pin Cat5 plug until it fit in. Using the breakout, you will be using pins 2, 3, and 5. I was able to successfully send a query from the ESP32 (the master) to the Renogy Wanderer. Make sure to first lower each terminal hatch by screwing the terminals counterclockwise CCW to expose the wire terminal hatch to the open position. Now I just have to use my program to set a few of the voltage settings. Update: I was able to get a RJ12 cable and came to the conclusion that I needed the 2 extra pins on the end. That INA219 is cool, but don't think it'll handle the 28.8-29.2V maximum or the amperage I want to put through them without modification (60A on the solar side with my new controller) I have a 200A shunt on the controller and 100A on the load. I'm also setting up a LCD on my I2C: www.netram.co.za/4302-gravity-i2c-16x2-arduino-lcd-with-rgb-font-display-black.html. Also note that I don't think charging power equals pv voltage * current. Integrated RS232 port allows communication with BT-1 Bluetooth module and usage of Renogy BT smartphone app. Electronic protection against reverse polarity, short-circuiting, customizable parameters, over-discharging, and reverse current. And allows users to change parameters when using the Renogy BT App. imgur.com/WVrPNzzI got a 10amp wanderer to debug at home instead of working on this in the sun where the charger is already deployed. Work, but outdated Windows 10 computer … Description the open position rn-42 module with. 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