Mikas & Barkchip
Hey Mikas, I’ve been building a little living‑tech garden where vines grow into the frames of a small autonomous planter. I need a smart control loop that can decide when to water, when to trim, and when to let the roots expand, so the whole thing stays balanced without my constant tinkering. Think you can help me code a bot that understands both plant biology and efficient pathfinding?
Sure thing, here’s a quick sketch of what you’re looking for. Think of it as a loop that keeps an eye on two main data streams: the plant’s state (humidity, growth stage, root pressure) and the garden’s layout (paths, obstacles, watering stations). The bot will:
1. Poll the sensors
2. Run a simple decision tree (or tiny neural net if you’re into that) to decide whether to water, trim, or wait
3. Use A* (or Dijkstra) on a grid that represents the planter’s interior to pick the shortest route to the next watering point or trimming spot
4. Act via your actuators, then sleep for a bit
Here’s a bare‑bones Python prototype to get you started:
```
import time
import heapq
class Plant:
def __init__(self, id, pos):
self.id = id
self.pos = pos
self.humidity = 0.0
self.growth = 0.0
self.root_pressure = 0.0
class GardenGrid:
def __init__(self, width, height, obstacles):
self.width = width
self.height = height
self.obstacles = set(obstacles)
def neighbors(self, node):
dirs = [(1,0),(-1,0),(0,1),(0,-1)]
result = []
for dx,dy in dirs:
nx, ny = node[0]+dx, node[1]+dy
if 0 <= nx < self.width and 0 <= ny < self.height and (nx,ny) not in self.obstacles:
result.append((nx,ny))
return result
def heuristic(self, a, b):
return abs(a[0]-b[0]) + abs(a[1]-b[1])
def astar(self, start, goal):
frontier = [(0, start)]
came_from = {start: None}
cost_so_far = {start: 0}
while frontier:
_, current = heapq.heappop(frontier)
if current == goal:
break
for next in self.neighbors(current):
new_cost = cost_so_far[current] + 1
if next not in cost_so_far or new_cost < cost_so_far[next]:
cost_so_far[next] = new_cost
priority = new_cost + self.heuristic(next, goal)
heapq.heappush(frontier, (priority, next))
came_from[next] = current
path = []
node = goal
while node != start:
path.append(node)
node = came_from[node]
path.reverse()
return path
def decide_action(plant):
if plant.humidity < 0.3:
return "water"
if plant.growth > 0.8 and plant.root_pressure > 0.7:
return "trim"
return "wait"
def main_loop():
grid = GardenGrid(10,10,obstacles=[(3,3),(4,3)])
plants = [Plant(1,(2,2)), Plant(2,(7,7))]
bot_pos = (0,0)
while True:
for plant in plants:
# Update sensor readings here
plant.humidity += 0.01
plant.growth += 0.02
plant.root_pressure += 0.01
action = decide_action(plant)
if action == "water":
path = grid.astar(bot_pos, plant.pos)
# Move along path, trigger watering
bot_pos = plant.pos
print(f"Watered plant {plant.id}")
elif action == "trim":
path = grid.astar(bot_pos, plant.pos)
bot_pos = plant.pos
print(f"Trimmed plant {plant.id}")
time.sleep(5)
if __name__ == "__main__":
main_loop()
```
Feel free to swap out the decision logic for something more sophisticated—maybe a tiny Bayesian model that takes light levels into account. The A* bit is just a skeleton; tweak the heuristic if your planter has diagonal movement or weighted costs. That should give you a decent starting point. Happy automating!
Good start, Mikas. Just remember to fine‑tune the humidity thresholds to match the real sensor output, and maybe add a small delay between steps so the bot doesn’t jump straight to the plant. Also keep an eye on those diagonal moves; the current A* only handles orthogonal steps. Once that’s sorted, the loop should run smoother than a fresh leaf. Happy tinkering!