measuring pH, EC, or even DO,OPR using a v2 controller

i enjoy looking at things i cannot see – such as concentrations of soluble solids in water. in such instances i really appreciate the power of visualization even more. we use atlas-scientific sensors often and the following tutorial is on how to use atlas-scientifics pH and EC sensors using a v2 controller. easy stuff … really the instructions for this tutorial can be found by clicking here a typical interactive icon output display screen is shown below:

temperature comprison

and san mateo was the clear winner in a couple of gardens i help manage remotely. here in is san mateo oakland, chicago, milwaukee

using 1-wire temperature sensors with the v2 controller

i have always enjoyed using 1-wire devices because i like that i can use multiple digital sensors from the same data pin. this was another fun document to write. here are further instructions on how to use a 1-wire temperature sensors with the v2 controller. the v2 controller has inbuild interface circuitry for adapting 1-wire sensors as shown below. this makes it easy to use 1-wire sensors as there are 6 pins D26, 27, 28, 29, 30, 31 on the v2 controller dedicated (have switchable parasitic resistors) for this purpose

configuring a v2 based smart aquaponics garden

system configuration once the sensors from the garden are connected to the v2 controller board, we are ready for system configuration. we will configure host names, time zones and wifi. at which point the raw data from the sensors should be ready for remote visualization through the api. configuring a unique garden name on the v2 controller power your v2 controller board using a 9v-48v dc power supply adapter. using an ethernet cable, connect to your v2 board to your laptop/computer this is the yellow cable in the middle on the right hand side in the diagram below. The dhcp […]

building a v2 based smart aquaponics garden

aquaponics uses bacteria to break down fish waste to grow plants without soil in a recirculating water system. smart aquaquaponics allows you to use your computer or mobile devices to visualize and control your aquaponics garden remotely. a typical garden is shown below: in this post we will looking at required material lists, how to build the physical garden and how to connect sensors to the garden. the following are diy instructions on how to go about building a kijani grows v2 based smart aquaponics garden like the one that will give you plates and years of fresh yummy micro-salads […]

connecting sensors to a v2 controller

Sensor types: V2 smart controllers support different sensors including digital sensors(eg a float switch), analogue sensors(eg photocell),  1-wire sensor(temperature), i2c, serial and usb based sensors The v2 board can interface most of  these directly without any extra external circuitry. Connecting digital sensors connecting digital sensors to v2 controllers using internal software based pull-up resistors is easy because digital sensors mostly  have two  connections, or three if they are active and require a power source. One contact connects to the respective digital pin eg D4 on the board and the other contact is grounded. the arduino style syntax for activating the […]

visualizing munchies and me junking out

i love flowers .. all shapes, all sizes, all colors … above all(most) scents. sometimes it is the only thing i grow … in my shamba. coming to  thinking about it, i think i choose a science pathway because of flowers, but that is a story for another day. i remembered this when i saw the flowers i had picked from my office garden in the background of this picture below from last week. it must have been a very ordinary day in paradise and was  likely on a roll lost in the moments of the fresh spring scents and […]


i had multiple milestones yesterday. some enormous ones lost me in the future. in the numbness of the present, all i could think about was teachers that taught and helped me learn. i think i was escaping reality, redirecting my mind from the fact that i received a shipment full of v2 boards sitting on my desk and it meant the dream part is over aa with kernel and software loaded running