davehcker

Building wireless (LTE-based) sensors for most major horticultural sensing needs. Measurements include:

- CO2. Side note: I was surprised to find that most (all?) CO2 sensors used in closed plant production setups are not meant to operate below 400 ppm.

- Air temperature, pressure, relative humidity

- Photosynthetically Active Radiation (PAR)

- Addons like: wind speed, wind direction, soil moisture and Electrical Conductivity (EC)

- The coolest and most challenging: pH, EC, and flow rate

The hardest part has been running everything on battery while maintaining accuracy and using LTE (2–4G) and not common LPWAN options like LoRa. I'm primarily a software guy, so the learning curve has been huge.

We need to update the FAQ. Now we offer a fixed subscription pricing model.

Thanks. My email address is in my HN bio.

We built a company around this very problem- indoor farming (including vertical indoor farming) is pretty complex and by default it's energy hungry. In theory, indoor farming is very efficient for commercial food production though. I thought we could be the company that does all the plant biology, automation complexity magic for growers, and growers just do seedling and harvesting in a super basic mechanical setup.

We are working with growers in EU, and they are all actually profitable growing normal veggies (lettuce, kale, etc.) as usual. But whenever we talked to some of the fancy VC-backed vertical indoor farming companies, they would usually not entertain us and would always claim that they were going to build everything by themselves. Almost always, the leadership in these companies was the type that didn't know anything about plants, software, status quo of AI, etc.

I didn't want to confess, but yes you're right. Elixir (or the willingness to learn Elixir) is a great filter for me to find the right people. Again, this is my purely subjective opinion and might as well be true for other languages as well.

I know-- I was scared like hell. But after the first week and multiple staging releases in less than 10 days, I was on top of it. Yes, hiring is real challenge and am facing it already. However, if I, even as a startup, reach the salary threshold, then hiring is not a problem. I'd say I've yet not found a case where I couldn't find a library for my use case.

I second this. I would say that I am pretty advanced with Python (and Django) and same with JavaScript (Vue and Nuxt) and have written applications that got used by multiple users. I saw a sharp rise in my productivity when I knew enough about the frameworks. But Elixir + PhoenixLiveView + Tailwind has been life changing.

I learned Elixir for the sake of the joy of learning a new programming language and I kept playing with it for few random days over 5-6 months. Finally, I took the leap of faith and for our startup I started the switch to Elixir + LiveView with minimal JavaScript hooks and I feel a weird bliss that we are two engineer FTEs and I can add features on a daily basis. Why that's the case, I still haven't ruminated myself, but my guess is 1. I have gotten older, 2. Elixir is beautiful and productive by design-- pattern matching, everything is a process (so the dimensionality of time is not an issue at all) and the code is kind of a right balance of simplicity and complexity, and in my opinionated view, there is "one" right way of doing things. 3. Standard tooling (mix, ExUnit). They have enabled us to write really maintainable code and for our next hires, we are willing to pay for them to learn Elixir than switching to other languages. Of course this is only for true for our web app which is actually a weird beast that interfaces farms, sensors, algorithms, and humans.

Quite few I had (assuming OPs question to be broad enough)-

1. Reading Malcolm X's autobiography _The Autobiography of Malcolm X_ in college. It transformed me such that within that one week of reading it, I developed (given my low standards) the strongest sense of orderliness in my life. Additionally, I decided for myself 'to straighten myself up' for this life.

2. Reading Dostoevsky's _Brothers Karamazov_. My 'inner' transformation (at the age of around 20.5) was so immense that it was also apparent from the outside. My transformation was 'not to be surprised by bad/evil' and seeing good in everything.

3. In programming/ computer science/ functional programming/ mathematics (I still don't fully get LISP, Haskell et. al. like other people here) but there are encounters in the field of lambda calculus, computation, cryptography that have left me totally transformed. Too many to elaborate.

OP here. No matter how hard I try, I just can't get it until I make frequent visits from 'different sides' to a location. I didn't even know about Topographical Disorientation, but it really hits home. Anecdotally speaking, I always apologize to people around me saying that, "I think I don't have the location module in my brain".