diff --git a/0 Journal/0 Daily/2026-01-07.md b/0 Journal/0 Daily/2026-01-07.md
index 1de9c68..532f634 100644
--- a/0 Journal/0 Daily/2026-01-07.md	
+++ b/0 Journal/0 Daily/2026-01-07.md	
@@ -52,4 +52,110 @@ Rough list of things to finish:
 - Handover 
 	- document everything I can think of with loom videos and articles
 
-Please let me know your thoughts and if anything is missing on the list.
\ No newline at end of file
+Please let me know your thoughts and if anything is missing on the list.
+
+
+
+---
+## Upper PDB Driver Requirements
+
+Structure:
+- each driver standalone and not dependent on osd-autopilot-2
+- the upper pdb manager module is responsible of using the three drivers (bq76942, bq34z100, hdc2010) to get the right registers at the right frequencies and publish them to where its needed (chirp, zmq, mqtt)
+- the upper pdb message structures are the following:
+
+1. HDC2010 Data
+	1. temperature in deg C
+	2. humidity in RH%
+	3. is heater on in bool
+2. HDC2010 Config (includes calibration values)
+	1. manufacturer ID
+	2. device ID
+	3. Measurement config
+	4. temperature offset
+	5. temperature resolution
+	6. humidity offset
+	7. humidity resolution
+	8. dataready and interrupt configuration
+	9. soft reset and interrupt cofniguration
+	10. etc (look at datasheet)
+3. BMS Data Fast
+	1. pack voltage in V
+	2. pack current in A (use CC2)
+	3. min cell voltage in V
+	4. max cell voltage in V
+	5. max temperature in BMS in °C
+	6. min temperature in BMS in °C
+	7. state of charge in % (from 34z100)
+	8. charge fet enabled
+	9. discharge fet enabled
+	10. has fault? --> protection/alarm active? --> if yes trigger a search for what is wrong and escalate
+4. BMS Data Detailed
+	1. soc_percent
+	2. remaining_capacity_mah
+	3. pack_voltage_mv
+	4. instantaneous_current_ma
+	5. average_current_2s_ma
+	6. discharged_mah
+	7. fault_bitmask
+	8. cell_voltages_mv
+	9. cell_min_index
+	10. cell_max_index
+	11. balancing_cells_bitmask --> indicates which cells are being balanced right now
+	12. num_cells_balancing
+	13. balancing_enabled
+	14. balance_threshold_mv
+	15. fault_flags
+	16. full_charge_capacity_mah
+	17. design_capacity_mah
+	18. time_to_empty_min --> based on what consumption?
+	19. time_to_full_min --> based on what charging?
+	20. state_of_health_percent
+	21. max_error_percent
+	22. cycle_count
+	23. total_cycle_count
+	24. average_power_mw
+	25. remaining_energy_kwh
+	26. design_energy_kwh
+	27. status_flags
+5. BMS Data Temperatures
+	1. bq76942_internal
+	2. bq76942_cell
+	3. bq76942_mosfet
+	4. bq34z100_internal
+	5. bq34z100_cell
+6. BMS Config
+	1. bq76942_fw_version
+	2. bq34z100_fw_version
+	3. all AFE safety settings (alerts and thresholds)
+
+
+### MQTT topic structure
+- /fleet/
+	- configurations/{ID}/
+		- hdc2010_updb/
+		- bq34z100_updb/
+		- hdc2010_updb/
+	- temperatures/{ID}/
+		- hdc2010_updb/
+		- bms_updb/
+	- bms/{ID}/
+		- data_fast
+		- data_detailed
+
+### HDC2010 barebones Driver Requirements
+- Needs to be configurable
+	- change resolution of measurements
+	- change measurement mode
+- needs to support a self test to ensure proper health status
+- needs to answer in polling mode
+- needs to support a calibration routine
+- 
+
+### BQ76942 barebones Driver Requirements
+
+
+### BQ34Z100 barebones Driver Requirements
+
+### UPDB Manager Module
+- needs to configure the 3 drivers according to the .conf file
\ No newline at end of file